Completed
Last Updated: 29 May 2026 14:27 by ADMIN
Created by: Owen
Comments: 4
Category: KendoReact
Type: Bug Report
6

When typing into a date picker and trying to type Feb 29th, 2024 (or any other leap year ofc) the date is updated incorrectly by the kendo date picker validation. As the user types the year their previous entry of 29 is updated to 28. This should update check should probably not occur until the user is done updating the input. If there is some fix or workaround we can do on our end to resolve this issue please let us know

Here's a video of the bug in our application

However, I was also able to reproduce the exact same behavior even in the documentation:

Completed
Last Updated: 29 May 2026 14:25 by ADMIN
Created by: Veselina
Comments: 1
Category: KendoReact
Type: Feature Request
1

React Server Components allow the developer to mix the fast server-side rendering with the interactivity of client-side JavaScript. 

So far modern JS frameworks were explicitly operating on the client (with SSR being an optional feature). With server-components it's the opposite - RS Cs introduce a new mental model for building hybrid applications that leverage both the server and the client.

The main advantages of the React Server Components are that:

  • Initial page load is faster;
  • You can move the data fetching to the server;
  • You can keep the large dependencies on the server;
  • The client-side JavaScript bundle size is reduced;
    Completed
    Last Updated: 29 May 2026 14:24 by ADMIN
    Release 2025 Q4 (Nov)

    Hi! 

    I have noticed that keyboard navigation doesn't work in the filter editor components inside the Filter component

    Reproduction:

    1. Open https://stackblitz.com/edit/react-rvwjsm?file=index.html
    2. Choose "name" or "price" from the first dropdown
    3. Type anything in the input field
    4. Try to change the cursor position in the field using arrow keys - doesn't work

     Is there a way to enable it or go around it? 

    Completed
    Last Updated: 29 May 2026 14:14 by ADMIN
    Created by: Daniel
    Comments: 8
    Category: KendoReact
    Type: Bug Report
    1

    Issue 1:

    I've implemented insert table tool in the editor and I'm setting some states on editor blur. The bug appears when the editor is focused and I try to add a table. When I select the rows and cols from the dropdown  and click to insert the table the editor blur is called my setStates are called and somehow the table insertion doesn't happen. In order to add the table I should not focus the editor and I have to click on the insert table button and select again the cols and rows.

    Issue 2:

    In the same editor I've added tableResizing plugin. The bug appears when I already have a table in the editor and open the insert table dropdown to add a new one. In that moment when the dropdown is still opened I hover over some of the already inserted table cells borders the insert table dropdown is closed.

    Issue 3:

    When the editor is controlled we have undefined as initial value and then we type something or try to add table for example the editor crashes and throw an error `Uncaught RangeError: Applying a mismatched transaction`. Even though the value type allows undefined EditorProps.value?: string | Node | undefined. It works fine though if the initial value is empty string.

     

    Package
    "@progress/kendo-react-editor":"^5.11.0 | 5.12.0"

    Minimal reproduction
    I'm providing an vite + react + ts project. Steps to run the project:
    npm install
    npm run dev

    It's reproducible in the provided examples in StackBlitz from Kendo, but the editor packages are not always resolved with turbo package manager. I guess it's the same issue as https://github.com/telerik/kendo-react/issues/1530

     

     

    Completed
    Last Updated: 29 May 2026 14:06 by ADMIN

    To demonstrate:

    1. Open your simplest interactivity/selection demo, which is not grouped, in StackBlitz. See: https://www.telerik.com/kendo-react-ui/components/grid/interactivity/selection/

    2. Add the Grid's group prop. To demonstrate the bug nothing else needs changed

    <Grid group={[]} ...

    3. Run demo, scroll down and pick a row.

    4. Observe the grid scrolls to the top and you cannot see your selected row unless you scroll back.

    Unplanned
    Last Updated: 29 May 2026 14:01 by ADMIN
    Scheduled for Q2 2025 (May)
    Created by: Speedy
    Comments: 2
    Category: KendoReact
    Type: Bug Report
    0
    We have recently added the scrollable prop to our tabStrip component but we are noticing that now on the active tabs there is a line, which is not show when not using the scrollable property. Is there anyway to remove this line? It makes it more difficult in terms of affordance and UX to see that this element is the active tab when there is this line. It somehow breaks the connection between the tab and the content. 


    Any help would be appreciated. 
    Completed
    Last Updated: 29 May 2026 13:59 by ADMIN
    Release 2025 Q4 (Nov)
    Created by: Maria
    Comments: 2
    Category: KendoReact
    Type: Bug Report
    0

    Hi,

    The first render of a DatePicker component with an onOpen prop throws an error: Unknown event handler property `onOpen`. It will be ignored.

    Reproduction:

    1. Open https://stackblitz.com/edit/react-xje2zdjc?file=app%2Fapp.tsx

    2. The error will appear in the console

    Expected behavior:

    No errors in the console

    Completed
    Last Updated: 29 May 2026 13:58 by ADMIN

    The examples from https://www.telerik.com/kendo-react-ui/components/intl/i18n/loading-data work with cldr* packages up to version 47.0.0. The Current version 48.0.0 causes an error:

    Error in /turbo_modules/@progress/kendo-intl@3.1.2/dist/npm/main.js (759:20)

    Cannot read properties of undefined (reading 'replace')

     

    Completed
    Last Updated: 29 May 2026 13:55 by ADMIN
    Release 2026 Q1 (Feb)
    Created by: Jie
    Comments: 2
    Category: KendoReact
    Type: Bug Report
    1

    Please see the example - https://codesandbox.io/p/sandbox/silly-wind-tpfg8n

    When column "Unit Price" is locked, while moving the horizontal scroll bar, the group header is sticky (expected behavior), but the group footer is not sticky (wrong behavior).

     

    Completed
    Last Updated: 29 May 2026 13:53 by ADMIN
    Created by: Peter
    Comments: 4
    Category: TimePicker
    Type: Bug Report
    0

    I'm submitting a...

    • Bug report

    Current behavior

    Timepicker component in adaptive mode behaves differently in version 11.0.0 (and above) compared to version 10.0.0 (and above):

    • "Set" button sets value but does not close popup - one more click needed
    • "NOW" button scrolls to current time, but does neither set value nor close the popup - two more clicks needed
    • in the top right corner there is a button with check icon which does the only thing - closes the popup (the same as "Close" button) - it is confusing

    Expected behavior

    We would expect the same behavior as in the 10.0.0:

    • "Set" button sets value and closes the popup
    • "NOW" button scrolls to current time, sets value and closes the popup
    • there are no two buttons with the same functionality

    Minimal reproduction of the problem with instructions

    1. Please run following link: https://stackblitz.com/edit/react-j3smansk?file=app%2Fapp.tsx,package.json and adjust app container width so that the timepicker popup is rendered in the bottom half of the screen, allowing both the popup and the editor to be visible at the same time. 
    2. Repeat previous step for following link: https://stackblitz.com/edit/react-ukfuqrdy?file=package.json,app%2Fapp.tsx
    3. As you can see in "app.tsx" examples are very the same (taken from https://www.telerik.com/kendo-react-ui/components/dateinputs/timepicker/adaptive-rendering), only versions of kendo-react components in "package.json" are different
    4. Observe situations described in Current behavior and Expected behavior sections

    What is the motivation or use case for changing the behavior?

    We would like to upgrade to 11.0.0 but we do not like this behaviour because it is disturbing, confusing and requires more clicks (time) to work with it.

    Environment

    Browser:

    • Chrome (desktop) version 138.0.7204.50 (Official build) (64-bit)
    • Firefox version 140.0 (64-bit)
    • Edge Version 137.0.3296.93 (Official build) (64-bit)

    System:

    • TypeScript version: KendoReact demos page version
    • Node version: KendoReact demos page version
    • Platform: Windows 10

    Best regards,

    Peter


    Completed
    Last Updated: 29 May 2026 13:52 by ADMIN
    Created by: Hubert
    Comments: 2
    Category: Window
    Type: Bug Report
    0

    When clicking on a resize handle (without dragging), the window unexpectedly shrinks.

    Steps to reproduce:

    1. Open a Window component
    2. Click on any resize handle without dragging

    Expected behavior: The window size remains unchanged when clicking a resize handle without dragging.

    Actual behavior: The window shrinks.

    Reproducible on the demo page: https://www.telerik.com/kendo-react-ui/components/dialogs/window

    Completed
    Last Updated: 29 May 2026 13:51 by ADMIN
    Release 2026 Q2
    Created by: Maria
    Comments: 2
    Category: KendoReact
    Type: Bug Report
    0

    Hi, 

    After pasting a value into the input box of the DatePicker I am then unable to clear it. The value of the DatePicker is correctly set to null, but the value displayed in the input box is unchanged.

    Reproduction steps:

    1. Open the grid filtering demo,

    2. Copy any of the date values from the grid, e.g. 9/20/1996, and paste it into the "First Ordered On" filter,

    3. Clear the filter using the clear button.

    Result:

    The value remains in the input box.

    Expected behaviour:

    The value should not be visible in the input box.

     

     

    Completed
    Last Updated: 29 May 2026 13:50 by ADMIN
    Release 2026 Q2
    Created by: Peter
    Comments: 2
    Category: TimePicker
    Type: Bug Report
    0

    I'm submitting a...

    • Bug report

    Current behavior

    Timepicker components now button in certain situations does not scroll timeselector to current time in adaptive mode.

    Expected behavior

    We would expect the now button scrolls to current time in all situations, also in adaptive mode .

    Minimal reproduction of the problem with instructions

    1. Please run following link: https://www.telerik.com/kendo-react-ui/components/dateinputs/timepicker/adaptive-rendering
    2. Clear timepicker value, there should be "hour:minute PM" in input
    3. Switch to tablet (or mobile) view
    4. Open time selector, it should be positioned to 12:00 AM, because it is min value
    5. Scroll AM/PM selector to PM
    6. Press NOW button
    7. Observe that timeselector did not scrolled to current time (if yes, only by huge accident)

    What is the motivation or use case for changing the behavior?

    It is obviously buggy behavior, we would like to use now button, but it has to work correctly.

    Environment

    Browser:

    • Chrome (desktop) version 144.0.7559.133 (Official build) (64-bit)
    • Firefox version 147.0.3 (64-bit)
    • Edge Version 144.0.3719.115 (Official build) (64-bit) 

    System:

    • TypeScript version: KendoReact demos page version
    • Node version: KendoReact demos page version
    • Platform: Windows 10

    Best regards,

    Peter


    Completed
    Last Updated: 29 May 2026 13:41 by ADMIN
    Created by: Glen
    Comments: 2
    Category: KendoReact
    Type: Feature Request
    13

    Hi

    Please build a React Diagram component similar to https://demos.telerik.com/aspnet-ajax/diagram/examples/overview/defaultcs.aspx

    Need More Info
    Last Updated: 20 May 2026 14:19 by ADMIN
    Test Environment:
    OS: Windows 11 Version 25H2 (OS Build 26200.8390)
    Browsers: Edge (Version 148.0.3967.70), Chrome (Version 148.0.7778.168)
    Screen Reader: NVDA (2026.1), JAWS (2026.2603.86), Narrator

    User Impact:
    Screen reader users are getting impacted because the focus moves in an unexpected order after activating the combo box. This makes it hard to understand where they are on the screen and can cause confusion while navigating.

    Pre-Requisites:
    1. Connect to 'MSFT AzVPN-Manual' VPN.
    2. Turn on Screen Readers:
      NVDA: Ctrl + Alt + N
      JAWS: Ctrl + Alt + J
      Narrator: Ctrl + win + Enter 
    3. Verbosity:
      NVDA: Default
      JAWS: Beginner, Highest
      Narrator: Default

    Repro Steps:
    1. Open the URL: https://agoradev-ppe.azurewebsites.net/home?dashboard-id=RnRToolsHomePage in edge/chrome browser in windows.
    2. Agora Home page will open.
    3. Press tab key to navigate to the 'Save As' control and activate it.
    4. 'Save As' dialog will open.
    5. Press tab key to reach to the 'Save to workspace' combo box and activate it using enter key.
    6. Verify whether screen reader focus order is incorrect after activating the 'Workspace to be Saved As in' combo box or not.

    Actual Result:
    After activating the “Workspace to be Saved As in” combo box, keyboard focus moves to the search edit field, while the screen reader focus shifts to the /user control, causing a mismatch in focus.

    Refer Attachment:
    1. Screen Reader focus order is incorrect after activating the 'Save to workspace' combo box in windows.png
    2. Screen Reader focus order is incorrect after activating the 'Save to workspace' combo box in windows.mp4

    Expected Result:
    After activating the combo box, both keyboard focus and screen reader focus should remain in sync and move to the search edit field in a proper sequence.
    Need More Info
    Last Updated: 20 May 2026 14:18 by ADMIN
    Test Environment:
    OS: Windows 11 Version 25H2 (OS Build 26200.8039)
    Browser: Edge (Version 146.0.3856.84), Chrome (Version 146.0.7680.165)
    Screen Reader: NVDA (2025.3.3), JAWS (2026.2603.86), Narrator

    User Impact:
    Screen reader users are getting impacted as they are unable to hear the names of the colors available in the Font Color dropdown, making it difficult for them to select the desired color independently.

    Pre-Requisites:
    1. Connect to 'MSFT AzVPN-Manual' VPN.
    2. Turn on Screen Readers:
      NVDA: Ctrl + Alt + N
      JAWS: Ctrl + Alt + J
      Narrator: Ctrl + win + Enter 
    3. Verbosity:
      NVDA: Default
      JAWS: Beginner, Highest
      Narrator: Default

    Repro Steps:
    1. Open the URL: https://agoradev-ppe.azurewebsites.net/home?dashboard-id=RnRToolsHomePage in edge/chrome browser in windows.
    2. Agora Home page will open.
    3. Press tab key to navigate to the 'Add a widget' control and activate it.
    4. Press tab key to navigate to the 'Table' control and activate it.
    5. 'Create Table' dialog will open.
    6. Press tab key to reach to the 'Font' dropdown control and activate it using enter key.
    7. Font color options will appear.
    8. Verify whether screen reader announces the name for the colors Present in Font dropdown control in windows or not.

    Actual Result:
    Screen reader does not announce the name for the colors Present in Font dropdown control in windows.
    Screen Reader announces as '#ffffff row 1 column 1'

    Refer Attachment:
    1. Screen reader does not announce the name for the colors Present in Font dropdown control in windows.png
    2. Screen reader does not announce the name for the colors Present in Font dropdown control in windows.mp4

    Expected Result:
    Screen reader should announce the name for the colors Present in Font dropdown control in windows.
    Screen Reader announces as '#ffffff row 1 column 1 White'
    Unplanned
    Last Updated: 11 May 2026 14:17 by ADMIN
    Scheduled for 2026 Q2
    Created by: Alex
    Comments: 1
    Category: KendoReact
    Type: Bug Report
    0

    I have noticed that whenever you want to upload multiple photos at once, using this React Upload Component & Events - KendoReact Docs & Demos (telerik.com) component the previews of the images uploaded bounce/ shake around. I've tried this on multiple browsers and they all have the same bouncing effect for the image previews. For a single photo it doesn't do it but once multiple images are added, it will do it.

     

    Completed
    Last Updated: 07 May 2026 10:30 by ADMIN
    Created by: Molly
    Comments: 4
    Category: DropDownList
    Type: Feature Request
    1

    Good morning,

    I have seen a component within the Angular library that I would like to include in my project using React. The link to it is here:

    https://www.telerik.com/kendo-angular-ui/components/dropdowns/dropdownlist/add-new-item

    Are you able to advise on how I could implement this please?

     

    Best wishes,

    Molly

    Unplanned
    Last Updated: 06 May 2026 06:56 by Bernd
    The Grid component provides a columnMenuIcon prop on GridProps and a per-column menuIcon prop on GridColumnProps. These props allow customization of the column menu trigger icon.

    The TreeList does not support this capability. It uses a fixed filter icon defined in the shared ColumnMenu from @progress/kendo-react-data-tools.

    Add equivalent columnMenuIcon support to the TreeList to match the Grid feature set. This change allows users to customize the column menu button icon without reliance on a render callback workaround.
    Completed
    Last Updated: 05 May 2026 13:28 by ADMIN

    Hello

    Localization messages for ColorPicker popup Apply/Cancel are missed.

    Option to hide does not work flatColorPickerSettings={{showButtons: false}}

     

    stackblitz

     
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