Bug report

NORM.S.INV, NORM.INV, and NORM.DIST are officially listed as supported formulas, but they are not functioning properly

Regression bug since 2024.4.1112

Reproduction of the problem

Open the Demos - https://demos.telerik.com/kendo-ui/spreadsheet/index

Paste: =NORM.S.INV(0.908789)

Result must be 1.3333347

Environment
Kendo UI version: 2024.4.1112
Browser: [all ]

Bug report

When there is a frozen column in the TreeList, not all the columns are resized correctly on double-clicking on the resize handler.

Reproduction of the problem

1. Open the Dojo - https://dojo.telerik.com/@NeliK/Aticudup
2. Double-click between the LastName and Position columns -> the LastName column is resized based on the content.
3. Double-click between the Position and Ext columns

Current behavior

The Position column is not resized and a scrollbar may appear depending on the width of the screen

Expected/desired behavior

The behavior when clicking on the drag handler should be the same for all the columns. In the described scenario the Posiiton column should be resized as well.

Environment

• Kendo UI version: 2024.1.130
• Browser: [all ]

Bug report

The Editor doesn't allow multiple separators through the tools configuration.

Reproduction of the problem

1. Open this Dojo example - https://dojo.telerik.com/eSESEheW/19

Current behavior

Only the first separator is rendered.

Expected/desired behavior

All the separators should be rendered

Environment

• Kendo UI version: 2024.1.319
• Browser: [all]

Bug report

Grid rows could not be properly selected on iPad

Reproduction of the problem

1. Open the dojo on iPad - https://dojo.telerik.com/gWsPhtrv
2. Try to select a row.

Current behavior

The rows could not be selected.

Expected/desired behavior

It should be possible to select a row in the Grid when it is loaded on iPad.

Used device for testing: iPad Pro iOS18.6

Environment

• Kendo UI version: 2025.3.812
• Browser: [all ]

When the RowHeight of the Gantt is enabled and the planned tasks are shown, the height of the row in the timeline is miscalculated and that creates displacement. 

• https://dojo.telerik.com/EgiGiXUF/5 

Additionally, the task dots used for the dependencies are misplaced in the same scenario as demonstrated in the dojo above. 

Bug report

In a Grid with locked columns, there's an invalid aria-selected attribute on tr elements in the locked columns.

Reproduction of the problem

1. Open this Dojo example - https://dojo.telerik.com/aKVfRvAN/6
2. Select the first row
3. Inspect the tr element under the locked column in the browser

Current behavior

The tr role='none' element has invalid aria-selected attribute

Expected/desired behavior

The element shouldn't have the aria-selected attribute.

Environment

• Kendo UI version: 2025.2.520
• Browser: [all]

Bug report

Reproduction of the problem

1. Open the Dojo - https://dojo.telerik.com/FLFnHPpW
2. Try to change the start/end of the events by dragging

Current behavior

Incorrect hint is displayed and the events can not be resized correctly.

Expected/desired behavior

The events should be properly resized.

The issue is related to the used theme. The behavior is correct when using the themes version 12.0.0

Bug report

Reordering using clickMoveClick in the Grid is very inconsistent.

Reproduction of the problem

1. Open the Drag and Drop Grid demo - https://demos.telerik.com/kendo-ui/grid/drag-drop
2. Try reordering a row using click-move-click

Current behavior

The targeted row is not being reordered

Expected behavior

The targeted row should be reordered

Environment

• Kendo UI version: 2025.1.211
• Browser: [all]

Bug report

Reordering in the same column is not working correctly

Reproduction of the problem

1. Open the Demos - https://demos.telerik.com/kendo-ui/taskboard/remote-data-binding
2. In the first column, move "Campaigns" below "Customer Research."
3. Check the Network tab of your browser, and no update is sent. The "Campaigns" is moved back to the top. Sometimes an update is sent but it contains the wrong index, so the item is still on top.

Current behavior

The task order remains the same

Expected/desired behavior

IT should be possible to reorder the tasks in the same column

The issue is a regression starting with 2025.2.520 version

Environment

• Kendo UI version: 2025.4.1111
• Browser: [all ]

I realize this has been covered by this workaround in the past, but the need to write extra code for moving the column back to the original position makes this seem a bit "hacky" and most importantly, the user experience of being allowed to drag the column in the first place just to see it jump back seems wrong.

The good news is that the kendoGrid already has a mechanism for preventing the columnReorder event from getting fired in the first place! The bad news is that it only happens for columns that have either of these 2 classes ["k-group-cell, "k-hierarchy-cell"]

My request is to have a configuration option that enforces that same behavior for specific columns as:

1. Add a "reorderable" flag to be set as part of the column configuration (set it to false for those we want to keep in place)

2. This flag will set a class on those columns the same way it works for columns with "k-group-cell" or "k-hierarchy-cell" classes, so the event can be prevented.

There is one important caveat to consider with this approach: Only columns at the front and the back of the grid can be locked in place, so there needs to be validation to prevent having non-reorderable columns among reorderable ones.

 

 

Bug report
DateTimePicker modern type cut does not flip popup when there is more space above the input

Reproduction of the problem

Open this example:

https://runner.telerik.io/fullscreen/OnUNodon/2

Resize the window so vertical scrollbar appears

Scroll so the DateTimePicker is below the center of the window 

Open the DateTimePicker

Expected/desired behavior
Popup shall be positioned on top of the input

Environment
Kendo UI version: all
Browser: [all]

TicketID 1545933

1. Navigate to: https://dojo.telerik.com/@PMcDonou/UVIXEPOk

2. Enter a space in maskedtextbox

Result: space is accepted as a valid character 

Expected: space should be prevented

 

Workaround: Use '\u2000' for promptChar instead of space

 

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
The PivotGridv2 does not calculate correctly Multiple measures with same type but different fields

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

Expected/desired behavior
PivotGridv2 should calculate correctly the fields when multiple measures with same type are defined

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

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

When the validation message appears that the Start Date should be before the End Date, picking a proper End Date does not automatically remove the validation message in the Gantt.

Workaround: call the validate method in the change event of the End DatePicker.
https://dojo.telerik.com/@martin.tabakov@progress.com/IQiRukIN/11

Reproduction of the problem

1. Open this Dojo example - https://dojo.telerik.com/@martin.tabakov@progress.com/IQiRukIN/10
2. Edit an existing task or create a new one.
3. In the Start DatePicker, choose a date that is after the EndDate, so that the validation message would appear.
4. Pick an EndDate that is after the StartDate.

Current behavior

The validation message remains and the user must again focus and blur the Start Date picker for the message to disappear.

Expected/desired behavior

The validation should be removed automatically after picking a EndDate that is after the StartDate.

Environment

• Kendo UI version: 2021.3.914
• Browser: [all]

I am currently using the ANDI accessibility tool and have encountered an accessibility issue with the tooltip icons across my application.

The tool reports an "Aria-Hidden Alert" stating: "Element is focusable but has or is contained by [aria-hidden = true]."  The tool also reports as "Keyboard Access Alerts" which states" "Focusable element is not in keyboard tab order; should it be tabbable"?

The HTML for these elements shows aria-hidden = true and focusable = false. I believe the focusable attribute should be set to true.

I have attempted to resolve this using JavaScript to directly removing aria-hidden = true and changing focusable to true.  However, there is no built-in configuration in Kendo UI for ASP.NET MVC to customize these accessibility attributes for tooltip icons therefore it didn't work.

Can you make the icons customizable?

I am including a screenshot of the code.

We use the KendoUI for jQuery framework in the enterprise SaaS application we create. Giving our clients access to their data and being able to provide a mechanism where a client could build out some of their own functionality on our Saas platform (ie accessing the Data, webservices etc) is highly desirable.

Our front end is based on a MicroUI approach, so if the client can vibecode building a new microUI, the UI experience with the other microUI we provide would be seamless. Examples might be: Create a Scheduler view showing all the European Holidays in 2026, or create a grid view populated with all the customers who have not transacted in 2025 and show their linkedin link/profile.

We can easily wrap any vide coded application into our application now using the microUI approach, but what we dont get is the same look and feel, themes and components being used. It is this we are looking to solve.

We are using Telerik ASP.NET MVC along with jQuery. Our requirement is to implement ADA-compliant tooltips. Previously, we were using the title attribute for Kendo controls to display tooltips. However, this approach is not ADA-compliant, as screen readers do not consistently read the title attribute.

We have tooltips for various controls, primarily TextBox and CheckBox, which are rendered via shared .cshtml views. We need an ASP.NET MVC solution to render Kendo controls with tooltips that:

Appear on hover of the control

Are accessible to screen readers

Minimize custom JavaScript logic

Essentially, the goal is to implement accessible tooltips for Kendo controls in a maintainable and standards-compliant way.

Is there another way we can implement this purely through a Kendo control only? For example, is there a Kendo property or configuration that could render the required span with the attribute we need? Since Kendo is supposed to be ADA compliant, ideally we shouldn't need additional custom code for a tooltip that can be read by screen readers. It would be preferable if this could be achieved through a built-in Kendo property or flag during rendering.

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: