When you have a simple kendodropdown list that is set to adaptiveMode = "auto", resizing the browser throws. This can be reproduced on your demo pages.

Steps to reproduce:

1. use this Dojo: https://dojo.telerik.com/LHJLQgzy which was created from your demo page
2. Ensure the browser is narrow enough to be considered mobile
3. run the project
4. confirm dropdown is functional
5. resize the browser to desktop size
6. the dropdown list stops working and throws

kendo.virtuallist.js:2890 Uncaught TypeError: Cannot read properties of undefined (reading 'style')

Hi Team,

Background

Kendo controls column width exclusively via <colgroup><col width="Npx"> attributes. CSS min-width on <col> is not supported by browsers (per spec). There is no minWidth property in the column configuration API. When a column has no explicit width set, it can collapse to near-zero width when the grid container is narrow - making content completely unreadable. This request excludes the columns.minResizableWidth as resizable is necessary with this configuration.

Request

We need the following to work generically across all grids without per-instance config changes:

1. Column minWidth API

columns: [
  { field: "name", title: "Name", minWidth: 150 }  // ← requested or it would be great if this min width we can apply at global level
]

Where minWidth is respected even if no width is specified, and is not overridden if an explicit width larger than minWidth is set else the global min width of 150px should be considered.

2. Grid-level minWidth config

$("#grid").kendoGrid({
  minWidth: 1000  // ← requested: grid never renders narrower than this or columnCount * default columns global width (150px) whichever is higher
});

Or ideally computed automatically as Math.max(1000, columns.length * defaultMinColWidth).

Hi Team,

I would like to request a way to prevent a responsive Grid from displaying an input when the screensize/container is shorter.  Perhaps, decreasing the buttonCount automatically instead of displaying the input may be a reasonable alternative.  This would be better than setting the pageable.responsive configuration to false.  

Thank you!

Bug report

Reproduction of the problem

The ColorPicker with adaptiveMode enabled throws an error after being destroyed and initialzed

1. Oppen the Dojo - https://dojo.telerik.com/iwXhhhCW
2. Click the ‘Refresh’ button
3. Resize the browser window or the Dojo

Current behavior

An error: kendo.columnmenu.js:2099 Uncaught TypeError: Cannot read properties of null (reading 'attr') is thrown

Expected/desired behavior

No error should be thrown after reinitializing the ColorPicker component.

Environment

• Kendo/Telerik version: 2026.1.415
• Browser: [all ]

Bug Report

When a navigatable Kendo UI Grid is configured with a stacked dataLayoutMode and is in an inline edit mode, using the arrow keys fails to operate as expected for the editor.

Reproducible

1. Go to this Progress Kendo UI Dojo.
2. Edit any line and get into text field or numeric field.
3. Use the arrow keys to edit the component, such as up/down for numeric change or left/right to move cursor in textbox

Current Behavior

The left and right arrow keys do not appear to function. The up and down arrows move to the next rows.

Environment

• Kendo UI version: 2026.1.415
• jQuery version: All Supported Versions
• Browser: all

Hi Team,

What we're looking to achieve, is that when the page/grid enters edit mode, ALL fields in the grid should immediately become editable fields. This would help prevent the user from having to click on every cell to edit first, and the user would have a direct view of all fields actually being editable, make their changes, hit the save button on the page, and save everything at once.

Currently it's difficult for the user to actually know which fields they can edit, as they have to click a cell before it becomes editable.

Thank you!

Bug report

Reproduction of the problem

1. Open the Dojo linked here - https://dojo.telerik.com/oJOxqTQk
2. Run the page and inspect the browser console during widget initialization.

Current behavior

Initializing a hidden-by-default Kendo Grid configured with stacked layout throws a JavaScript error during initialization - Uncaught TypeError: Cannot read properties of undefined (reading 'find')

Expected/desired behavior

No errors should be thrown when initializing a hidden stacked layout Grid.

Environment

• Kendo/Telerik version: 2025.4.1321
• Browser: [all]

Bug report

When the timezone of the machine and the timezone set in the Scheduler are in different days, the currentTimeMarker is not displayed in the Timeline view.

Reproduction of the problem

1. Change the timezone of the machine to 'Fiji' or another timezone, thus the 'Honolulu and the chosen timezones are on different days. For example, when it is 3 am on 01.06 in Honolulu, it is 1 am on 02.06 in Fiji.
2. Open the Dojo linked here where the timezone is set to 'Pacific/Honolulu' - https://dojo.telerik.com/@NeliKondova/UVuDAJib

Current behavior

When the timezone of the machine and the timezone set in the Scheduler are in different days, the cusrrentTimeMarker is not displayed in the Timeline view.

Expected/desired behavior

The cusrrentTimeMarker should be displayed in all the views.

Environment

• Kendo UI version: 2023.1.425
• Browser: [all ]

Bug report

aria-live="polite" in file upload is not read out to screen readers.

Reproduction of the problem

https://demos.telerik.com/kendo-ui/upload/index

Upload an invalid file and see what the reader says

Tested with Jaws and NVDA

TicketID:
1713170

Environment

Kendo/Telerik version: 2026.1.415

Broser: all

Bug report

Reproduction of the problem

Approach described in the documentation is not working as described after version 2024.4.1112

Dojo: https://dojo.telerik.com/pXPIOvsq/2 - works with version 2024.3.1015, broken in version 2024.4.1112

Current behavior

Splitter cannot be made resizable as documented.

Expected/desired behavior

It should be possible to change the resizable option for panes.

TicketID:

1713187

Environment

• Kendo/Telerik version: 2024.4.1112

Bug report

Notifications overlap when multiple invoked on mobile. Tested on iPad Air 13 2025 v18.6 and iPhone 26.3.1

Regression with v.2023.1.314

Reproduction of the problem

https://demos.telerik.com/kendo-ui/notification/index

Click on "As a popup at bottom-right" multiple times

The notifications are overlapping and broken into multiple lines



Expected/desired behavior

Notifications should not overlap and rendering on a single line

Environment
Kendo UI version: 2026.1.415
Browser: [ ipadOS 17.1.1 Safari ]

The horizontal space between all OrgChart nodes on the same level is one and the same and it is equal to the horizontal space needed to show the child nodes of the parent with most child nodes. It is represented by the red squares on the image below. This results in excessive empty horizontal space between nodes with no child nodes or no visible child nodes.

This may be observed on the following Dojo runner. Currently the OrgChart has empty space between the first level nodes, and also there is empty space after the last node:

Suggested behavior:
There is no empty horizontal space between nodes on the same level - highlighted in yellow on the image above. In the above scenario, there should be no empty space between the first level's second and third node and no space after the third node, which may be observed, when the first node has no expanded child node:

Bug report

In a Grid with virtual row and column scrolling enabled, if there are large number of hidden columns, the horizontal scrolling is very slow.

Reproduction of the problem

1. Open this Dojo example - https://dojo.telerik.com/EWeVaQOc/12
2. Try to scroll horizontally

Current behavior

Horizontal scrolling is slow

Expected/desired behavior

Horizontal scrolling should be smooth

Environment

• Kendo UI version: 2023.3.1114
• Browser: [all]

Bug report
ScrollView prevents Nested MediaPlayer volume scroller from scrolling


Reproduction of the problem
Dojo: https://dojo.telerik.com/ateLaQoC

Scroll to 3rd page

Scroll volume scrollbar

Expected/desired behavior
Volume scrollbar shall be scrollable


Environment
Kendo UI version: [all]
jQuery version: [all]
Browser: [all]

Bug report

In RTL Scheduler dragging of events does not horizontally scroll is not possible

Reproduction of the problem
1. Open this Dojo example - https://dojo.telerik.com/HrVYvFSY

2. Drag the Meetings with Alex event to the left. Scrolling  to non visible slots not possible.

3. Scroll to the left to find an event in the middle of the day, start to drag it, the scheduler scrolls horizontally to the beginning of the day

Expected/desired behavior
Scrolling to the left shall be possible as it is in the non LTR Scheduler

Environment
Kendo UI version: all
Browser: [all]

Hello,

We would like to request this feature to expand on a Grid components Options.

Provide a built-in way for end-users to redefine or rename a Grid column's title directly through the user interface. Currently, if a user wants to change a column header from "Title1" to "Title2”, developers must write significant custom jQuery to modify the DOM or update the column via set options.

This is a functional request from our users, that we would like to provide for them.

Thanks,
John

Bug report

DropDownList: dataItem(e.item) returns undefined when selecting across different groups

Regression since 2026.1.212

Reproduction of the problem

1. Open the next Dojo: https://dojo.telerik.com/aVJUwDTZ

2. Open the DropDownList.

3. Select an item from a group different from the one currently active/selected.

Observe the console for this.dataItem(e.item).

Current behavior
undefined is logged for this.dataItem(e.item)

Workaround: https://dojo.telerik.com/LUdpEmnY

Environment
Kendo UI version: 2026.1.212 or newer
Browser: all

Bug report
When using an Editor in Inline mode and dragging an image a JavaScript error is thrown: Uncaught TypeError: Cannot read properties of null (reading 'nodeType')

Reproduction of the problem
Open the Dojo - https://dojo.telerik.com/eBsLBgvN

1. Insert an image and some text into the editor.
2. Select both the image and text together.
3. Start dragging by clicking on the text area
Exception occurs

index-esm.js:17572 Uncaught TypeError: Cannot read properties of null (reading '_destroyResizeHandles')

Environment
Kendo UI version: 2026.1.325
Browser: [all ]