Unplanned
Last Updated: 16 Jan 2026 07:46 by ADMIN
Created by: Barry Burton
Comments: 4
Category: Menu
Type: Bug Report
3

### Bug report

The Menu flickers on page load (i.e., when reloading the page, when navigating through the application pages).

### Reproduction of the problem

Attached is a demo that replicates the issue.

### Expected/desired behavior

The Menu should be rendered smoothly.

### Environment

* **Kendo UI version: 2022.1.412
* **jQuery version: 3.5.1
* **Browser: [all]

Unplanned
Last Updated: 09 Jan 2026 13:57 by Sasa
Created by: Sasa
Comments: 0
Category: Grid
Type: Bug Report
1

Bug report

Even if a message file is added, the command buttons and the popup title in the Grid are not localized

Reproduction of the problem

  1. Open the Dojo examples:
  1. Decrease the size of the screen so the Grid to be displayed in adaptive mode.
  2. Click on a row and select the 'Edit' button to open the Edit popup

Current behavior

The command buttons and the dialog title are not localized:

Image

Expected/desired behavior

It should be possible to change and localize the messages texts.

Workaround

 function onEdit(e){
      e.container.closest('.k-window').find('.k-window-title').text('My custom text')
      e.container.closest('.k-window').find('.k-button[ref-update-button]').text('Button Update Changed');
      e.container.closest('.k-window').find('.k-button[ref-cancel-button]').text('Button Cancel Changed');
 }

Environment

  • Kendo UI version: 2025.4.1217
  • Browser: [all ]
Unplanned
Last Updated: 31 Dec 2025 11:26 by ADMIN

Bug report

Similar to #5759. The issue is reproducible with mobile mode and vertical grouping enabled.

Reproduction of the problem

Dojo example: https://dojo.telerik.com/enaNotaZ/2

Current behavior

Misalignment between the group cells (e.g., Bob) and the day cells.

Expected/desired behavior

Properly aligned cells.

Environment

  • Kendo UI version: 2023.3.1114
  • jQuery version: x.y
  • Browser: [all]
Unplanned
Last Updated: 30 Jun 2025 07:01 by Aleksandar

Bug report

The rowReorder event does not return the correct newIndex when dragging a row from a lower row index to a higher row index.

Reproduction of the problem

  1. Run this dojo https://dojo.telerik.com/omyPpaZb
  2. Drag Chai and drop after Chang. Note oldIndex is 0, newIndex is 2, which is unexpected as indices are 0-based

Image

  1. Re-run the dojo to start fresh and drag Chang and drop before Chai and the indices are correct - oldIndex: 1, newIndex: 0

Image

Current behavior

The returned newIndex is incorrect.

Expected/desired behavior

The returned newIndex should be correct.

Environment

  • Kendo UI version: 2025.2.520
  • Browser: [all]
Unplanned
Last Updated: 24 Jun 2025 15:21 by ADMIN
Created by: Aleksandar
Comments: 0
Category: FileManager
Type: Bug Report
0

Description

FileManager calls Create and Destroy instead of Update on move.

That is not what happens in the file system. Move is Update operation where the location of the item is updated. No files are copied or deleted.

Copying files and directories unnecessarily wastes the resources on the server and the cloud where computing and storage operations are charged.

If Destroy fails which might happen because Create and Destroy are executed separately then files are copied and not moved.

Expected behavior

Move calls Update.

Unplanned
Last Updated: 13 Jun 2025 11:39 by Paul

### Bug report

When adding custom classes or styles to the TimeDurationPicker component, they are applied to the hidden input elenent rather than to the parent element.

### Reproduction of the problem

1. Create a TimeDurationPicker and add a class to its element:

<input id="timedurationpicker" class="testClass" />

2. When you inspect the component's markup, the "testClass" is added to the hidden input element.

A Dojo sample for reproduction: https://dojo.telerik.com/IsTnGqsk

### Expected/desired behavior

Any custom attributes must be added to the parent element with class "k-timedurationpicker".

### Environment

* **Kendo UI version: 2025.2.520
* **jQuery version: 3.7.1
* **Browser: [all]

Unplanned
Last Updated: 10 Jun 2025 11:46 by ADMIN
Scheduled for 2025 Q4 (12.11.2025)
Created by: David
Comments: 0
Category: Installer and VS Extensions
Type: Bug Report
0
Steps to Reproduce:

  1. Installs both extensions ASP.NET Core and MVC without the latest MVC and ASP.Net Core product versions
  2. Create an ASP.NET Core project with an older version
  3. An Update Available Notification appears for ASP.Net Core
  4. Click on the "Update Now" button
  5. The Upgrade project wizard is launched
  6. Click on "Next" button, then the following error appears:

The wizard encountered an error while trying to handle user event.
System.InvalidOperationException: Sequence contains no matching element
at System.Linq.Enumerable.First[TSource](IEnumerable`1 source, Func`2 predicate)
at Telerik.KendoUI.Mvc.VSX.Wizards.ViewModels.MvcDistributionChooserUpgradeViewModel.GetProjectWithLowestTargetFramework(List`1 projects)
at Telerik.KendoUI.Mvc.VSX.Wizards.ViewModels.MvcDistributionChooserUpgradeViewModel.GetDistributions()
at Telerik.VSX.ViewModels.DistributionChooserViewModelBase`1.get_Distributions()
at Telerik.VSX.ViewModels.DistributionChooserViewModelBase`1.get_CurrentDistribution()
at Telerik.KendoUI.Mvc.VSX.Wizards.UpgradeProjectWizard.TryGetDistributionToken(TargetMvcVersion mvcVersion)
at Telerik.KendoUI.Mvc.VSX.Wizards.UpgradeProjectWizard.GetPropertyValue(String propertyName)
at Telerik.VSX.WizardEngine.Controls.WizardControlBase.PopulateCollectedValues(IPropertyDataDictionary gatheredData)
at Telerik.VSX.WizardFramework.Pages.DynamicPageController.GetData()
at Telerik.WizardFramework.Wizard.GetCurrentPageData()
at Telerik.WizardFramework.Wizard.UpdateNavigation()
at Telerik.WizardEngine.Helpers.EventHelper.CatchExceptionAndSendReport(Action action)
Unplanned
Last Updated: 29 May 2025 12:58 by ADMIN
Created by: Bryan Patrick
Comments: 0
Category: Grid
Type: Bug Report
1

Bug report

Expose additional API configurations for the Grid's ToolBar

Reproduction of the problem

As of recent releases, the Kendo UI Grid Toolbar has been substituted with the Kendo UI Toolbar. This change allows users to add the majority ToolBar.items API options apart from the built-in tools.

As noted within the Kendo UI for jQuery API documentation for the Grid's Toolbar:

"Apart from the built-in tools, the Grid fully exposes the ToolBar.items API. This way you can specify any custom tools in the widget using the components available in the ToolBar itself."

Current behavior

The inherited ToolBar.items API options are not available for the server-side Telerik UI Grid for ASP.NET Core and MVC wrappers as well.

Expected/desired behavior

It would be beneficial to the customers if the inherited ToolBar.items API options are available for the server-side Telerik UI Grid for ASP.NET Core and MVC wrappers as well.

Environment

  • Kendo UI version: 2024.1.130
  • Browser: [all]
Unplanned
Last Updated: 18 Mar 2025 08:50 by ADMIN
Created by: Garrett
Comments: 4
Category: UI for ASP.NET Core
Type: Bug Report
1

I am seeing that once a grid checkboxlist column filter exceeds about 1000 items the wait time appears to increase non-linearly (performance is worse than linear.)  For example, with 3,000 items the page freezes for about 30 seconds.  The data is fetched in under 50 milliseconds, so the vast majority of this time appears to be processing by Kendo.

Please see the attached for my configuration.

Unplanned
Last Updated: 13 Feb 2025 13:40 by ADMIN
Created by: jhudson
Comments: 2
Category: Grid
Type: Bug Report
0
Grids that showed fine in 2024.3 now cut off the No Records Available box and show a scroll bar 
Unplanned
Last Updated: 10 Jan 2025 12:57 by Peter

### Bug report

When the Grid is initialized in a hidden container (for example, in a non-selected tab of a TabStrip) and its initial data binding is disabled (autoBind: false), the pager information is not visible when the data is loaded afterward.

### Reproduction of the problem

1. Initialize a Grid into a non-selected tab of a TabStrip and set its autoBind option to "false".

2. Select the tab and check how the empty Grid is rendered.

3. Call the read() method of the Grid's DataSource in the browser console to request the data.

4. The data is loaded, but the pager information remains hidden.

A Dojo sample for reproduction: https://dojo.telerik.com/njVgBvza

### Expected/desired behavior

The pager information must be available when the data is loaded into the Grid.

### Environment

* **Kendo UI version: 2024.4.1112
* **jQuery version: 3.7.1
* **Browser: [all]

Unplanned
Last Updated: 19 Nov 2024 13:36 by ADMIN
Scheduled for 2024 Q4 (Nov)

### Bug report

When the Virtualization of the MultiColumnComboBox is enabled, the table headers and rows are not aligned correctly.

### Reproduction of the problem

A Dojo sample for reproduction: https://dojo.telerik.com/ORalaWoq

The tables and rows are aligned as expected when using version 2021 R3 SP2 (2021.3.1207).

A temporary workaround:

<style>
    .k-table-list .k-table-group-row, .k-table-list .k-table-row {
        display: inline-flex;
    }
</style>

 

### Expected/desired behavior

The headers and rows should be aligned correctly when the Virtualization is enabled.


### Environment

* **Kendo UI version: 2022.1.412
* **jQuery version: 1.12.4
* **Browser: [all]

Unplanned
Last Updated: 01 Nov 2024 16:11 by Dan

Bug report

The issue is reproducible when the Editor is used as an item editor:

editable: {
form: {
buttonsTemplate: "",
items: [{
field: "Title",
label: "Title:"
}, {
field: "Description",
label: "Description:",
editor: "Editor"
}]
}
}

It is not reproducible with editor "TextBox" or "TextArea"

Reproduction of the problem

  1. Run this dojo example: https://dojo.telerik.com/KeIjSJgr
  2. Click the menu button in one of the cards and select "Edit card" from the dropdown

Current behavior

The following js exception is thrown:
kendo.all.js:131959 Uncaught TypeError: Cannot read properties of null (reading 'open')

Expected/desired behavior

No exception is thrown and the Editor can be used to edit the field value.

Environment

  • Kendo UI version: 2024.3.1015
  • jQuery version: x.y
  • Browser: [all]
Unplanned
Last Updated: 30 Oct 2024 12:57 by Emily

Bug report

Reproduction of the problem

  1. Run this dojo: https://dojo.telerik.com/nuzVFAFI/6
  2. Open the browser dev tools and clear the console.
  3. Copy the table below the Editor and paste it in the Editor

Current behavior

An error for the missing image is thrown:
GET https://localhost:63252/test.png 404 (Not Found)

Expected/desired behavior

No error is thrown, since the value of the background-image property has been replaced with "none" in the Editor events and the actual content the Editor visualizes does not use the image:

<tr style="box-sizing: border-box; border-style: solid; border-width: 1px 0px; background-image: none;">
...
</tr>

Environment

  • Kendo UI version: 2024.3.1015
  • jQuery version: x.y
  • Browser: [Chrome XX ]
Unplanned
Last Updated: 30 Sep 2024 10:29 by Jacek

### Bug report

On mobile devices, when the TaskBoard columns are filled with cards, the users have trouble scrolling horizontally through the columns. When they attempt to scroll the screen, they accidentally drag cards instead of scrolling the columns. This makes navigation in the TaskBoard quite difficult, particularly for projects with a large number of cards.

    ### Reproduction of the problem

    1. Create a TaskBoard with at least two columns.

    2. Fill the columns with cards.

    3. Open the browser DevTools and switch to mobile view. Tap a card to scroll the columns horizontally or tap at the bottom of the TaskBoard to activate the horizontal scrollbar.

    4. The last card is accidentally dragged.

    A Dojo sample for reproduction: https://dojo.telerik.com/izASODan

    ### Expected/desired behavior

    When the user makes a hold/long press/long tap, show the "indicator for drag and drop" and then he/she continues with the gesture by moving the card to the desired column and lift the finger. This way, the accidental dragging will be prevented. For more information, refer to the GitHub issue.

    Note: The cards in the TileLayout can be dragged only through the card's title element. The TaskBoard cards can be dragged through the card's body, as well.

    ### Environment

    * **Kendo UI version: 2024.3.806
    * **jQuery version: 3.7.0
    * **Browser: [all]

    Unplanned
    Last Updated: 10 Sep 2024 14:43 by Anita

    Bug report

    When the Grid is nested in a relatively positioned container, during the export the Grid gets an overflow style to its wrapping element. Then the style is removed and re-added again. This happens in a loop, which results in a vertical scrollbar constantly appearing and hiding.

    Reproduction of the problem

    1. Open this dojo example: https://dojo.telerik.com/IZoxOvOG/7
    2. Click the "Export to PDF" button in the Grid's toolbar

    Current behavior

    Flickering caused by a scrollbar appearing and hiding

    Expected/desired behavior

    The Grid should remain unchanged during the export and no scrollbar should appear and hide during the export.

    Environment

    • Kendo UI version: 2024.3.806
    • jQuery version: x.y
    • Browser: [all ]
    Unplanned
    Last Updated: 09 Sep 2024 09:36 by Tino

    ### Bug report

    When the TimePicker's type is "modern", the "min" and "max" options cannot be set dynamically through the min(), max(), and setOptions() methods.

    ### Reproduction of the problem

    1. Define the TimePicker with componentType: "modern".
    2. Set its "min" and "max" values through the min() and max() options.
    3. The "min" and "max" values are not visually updated.

    A Dojo sample for reproduction: https://dojo.telerik.com/OXAqUYiw

    ### Expected/desired behavior

    The  "min" and "max" values must be dynamically updated when the TimePicker's type is "modern".

    ### Workaround

        let timeView = $("#timepicker").data("kendoTimePicker").timeView;
        timeView.options.specifiedRange = true;
        timeView.options.min = new Date(2024, 0, 1, 9, 00, 00);
        timeView.options.max = new Date(2024, 0, 1, 22, 00, 00);
        timeView._updateRanges();
    ### Environment

    * **Kendo UI version: 2024.3.806
    * **jQuery version: 3.7.0
    * **Browser: [all] 

     

    Unplanned
    Last Updated: 12 Aug 2024 11:00 by Nico

    ### Bug report

    When subscribing to the "requestStart"/"requestEnd" events of the DataSource after the Grid's initialization, the events do not fire during the Excel export.

    ### Reproduction of the problem

    1. Enable the server operations of the Grid's DataSource.

    2. Get a reference to the Grid and handle the DataSource "requestStart"/"requestEnd" events by using the bind() method.

    3. Export the Grid's data to Excel through the built-in command.

    4. The "requestStart"/"requestEnd" events do not trigger when the read request is activated.

    A Dojo sample for reproduction: https://dojo.telerik.com/eyiDIGeM

    ### Expected/desired behavior

    The  "requestStart"/"requestEnd" events must trigger when exporting the Grid to Excel.

    ### Environment

    * **Kendo UI version: 2024.3.806
    * **jQuery version: 3.7.0
    * **Browser: all

    Unplanned
    Last Updated: 21 May 2024 08:30 by ADMIN
    Scheduled for 2024 Q3 (Aug)

    ### Bug report

    When removing a data item through the DataSource remove() method, and then trying to add a new record in the Grid, the editable row does not close when clicking the "Save" command. The Grid is set up for InLine editing. 

    ### Reproduction of the problem

    1) Create an InLine editable Grid that binds to local data.

    2) Add a custom column command that removes the respective data item by using the remove() method of the DataSource.

    3) Delete a specified Grid record through the custom command.

    4) Add a new record and click the built-in "Save" command.

    5) The row remains in edit mode.

    A Dojo sample for reproduction: https://dojo.telerik.com/IQIDuGOt

    The last working version is 2024.1.130

    ### Expected/desired behavior

    The editable row must close when clicking "Save" or "Cancel".

    ### Workaround

    Use the Grid removeRow() method rather than the DataSource remove() method.

    ### Environment

    * **Kendo UI version: 2024.1.319
    * **jQuery version: 3.7.0
    * **Browser: [all]

    Unplanned
    Last Updated: 22 Feb 2024 12:47 by Sohini

    Bug report

    When attributes like Html class are added to the Html element from which the Window widget is initialized these attributes are applied to the Window's .k-window-content element instead of the outermost .k-window. This behavior is inconsistent with other web dev tools like Telerik UI for Blazor and the ThemeBuilder.

    Reproduction of the problem

    1. Run this Dojo
    2. Inspect the .k-window-content Html element of Window.

    Expected/desired behavior

    Window rendering must be consistent with other Kendo and Telerik suites.

    Environment

    • Kendo UI version: 2024.1.130
    • Browser: [all]
    1 2 3