### Bug report

The Validator shows a duplicated error message when validating a CheckBox.

### Reproduction of the problem

1) Create a standard HTML form with a checkbox, which has two inputs - a visible one with value="true" and a hidden one with value="false" (this is the generated HTML markup when using <input asp-for="@Model.IsChecked" /> or Telerik UI for ASP.NET Core CheckBox component).

2) Initialize a Kendo UI Validator on the form and create a custom rule for the checkbox editor.

3) Submit the form and review the duplicated error message in the validation summary. The Validator validates both hidden and visible inputs.

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

### Expected/desired behavior

A single error message must be displayed when the checkbox is not checked and the form is submitted.

### Environment

* **Kendo UI version: 2025.2.702
* **jQuery version: 3.7.1
* **Browser: [all]

Bug report

Spreadsheet  render event does not fire since 2025.2.520

Reproduction of the problem
https://demos.telerik.com/kendo-ui/spreadsheet/events

Expected/desired behavior
Render event must fire initially.

The issue is a regression starting with 2025.2.520 version.

Environment
Kendo UI version: 2025.2.520
Browser: [all ]

Hi folks,

I am using the Gantt control and somtimes, I correctly do not have any data to show in it.

In this case, in the left-side of the Gantt (which is technically a Grid), the message "No records to display" is shown.

Since I am using Kendo with kendo.culture('de-CH') (Swiss German) and also the Swiss German messages, I would expect the message to be translated there as well.

Especially, when I am looking into the messages-file (https://kendo.cdn.telerik.com/2021.1.330/js/messages/kendo.messages.de-CH.min.js) and it does in fact contain the translation for the Grid's noRecords. And it's also there in the JavaScript code when having the Swiss German culture loaded:

console.log(kendo.ui.Grid.prototype.options.messages.noRecords);

Could you please have a look at this and make the Gantt component respect the translations?

For better illustration, I have prepared the following Dojo, that uses Swiss German culture and displays an empty Gantt chart: https://dojo.telerik.com/iXuKeYaZ

As I ran into this problem while using Telerik for ASP.NET Core, I am looking forward to a solution that that works there too.

Thanks in advance!

Kind regards,

Janick

Bug report

When a user clicks on a locked column header (for example for sorting), the focus unexpectedly shifts to the first unlocked column instead of remaining on the clicked header.

Reproduction of the problem

1. Open the Dojo - https://dojo.telerik.com/bZUXgWQT.
2. Click on the ID or Name header.

Current behavior

The visual/keyboard focus immediately moves to the first unlocked column. If the user clicks the second locked column, the focus shifts to the second unlocked column.

Expected/desired behavior

Clicking on a locked column should retain focus on that column, not move to another grid column.

Regression

The issue is a regression starting with 2022.3.913 version

Environment

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

Bug report

MVVM Textbox doesn't bind the value correctly to the viewModel on iOS devices in Safari

Regression introduced with 2021.3.1207

Reproduction of the problem

1. Open this Dojo example on iOS device in Safari - https://dojo.telerik.com/NpVbVrsn
2. Type some text in the input
3. Click the button

Current behavior

The value is undefined

Expected/desired behavior

The value should match the input text

Environment

• Kendo UI version: 2025.2.520
• OS: iOS
• Browser: Safari

Bug report

Form validation is very slow in 2025.Q1

Reproduction of the problem

Dojo: https://dojo.telerik.com/wKZQZqMu

1. Please choose a Kendo UI 2025.1.211 library and click run

2. Click the show form button on the grid's toolbar. Popup a new window with kendo form.

3. Please click validate button and please look at the console.

Then

1. Please choose a Kendo UI 2024.4.1112 library and click run

2. Click the show form button on the grid's toolbar. Popup a new window with kendo form.

3. Please click validate button and please look at the console.

The issue is a regression starting with 2025.1.211

Environment
jQuery: 3.4.1
Kendo UI version: 2025.1.211
Browser: [all]

Bug report

When the user enters invalid data in Grid popup edit form and presses 'Enter' the Save button becomes disabled. The button does not get enabled even after entering a valid data.

Reproduction of the problem

1. Open the pop-up editor by clicking "Create" or "Edit" in the Grid in the Dojo linked here - https://dojo.telerik.com/QyVhowiQ.
2. Leave a required field (like "ProductName") empty and click Save.
3. Validation fails, as expected.
4. Notice that the Save button becomes disabled. Enter a valid data in the field.

Current behavior

The Save button becomes disabled after a validation failure and cannot be re-enabled.

Expected/desired behavior

The Save button should remain enabled or re-enable automatically after validation issues are resolved.

The issue is a regression starting with 2025.2.702

Environment

• Kendo UI version: 2025.2.702
• Browser: [all ]

Bug Report

When building with NPM, the glob is mismatched. This is currently related to the source code build.

Reproduction

1. Build with version 2025.2.702 in NPM.

Current behavior

Receiving the specific error message:
[!] SyntaxError: The requested module 'glob' does not provide an export named 'default'

Environment

• Kendo UI version: 2025.2.702
• jQuery version: All supported versions
• Browser: all

Bug Report

When backspacing input in the row filter of a navigatable Kendo UI Grid, it appears to attempt to delete a record.

Reproducible

1. Go to this Progress Kendo UI Dojo
2. Filter the product name
3. Press the backspace

Current Behavior

Filtering is prevented and a delete confirmation dialog appears. Upon selection in the dialog, the filtering occurs.

Environment

• Kendo UI version: 2025.3.812
• jQuery version: All Supported Versions
• Browser: all

Description

Upon editing a Kendo UI Grid with inline editing with a hidden column, the Update/Save/Cancel buttons appear in the wrong placement.

Reproduction

1. Go to this Progress Kendo UI Dojo
2. Edit a row.

Current Behavior:

Expected Behaviour:

Environment

Kendo UI version: 2025.3.812
Browser: [all ]

For example; similar to http://www.highcharts.com/stock/demo/arearange

Having area 'scatter' support, such as 'scatterArea', and 'scatterAreaRange', like the existing 'scatterLine', is also desirable.

Hello

Starting from version 2025.2.520:
Kendo Grid with NumericTextBox cell editor and "navigatable: true" exit edit cell state on double click/hold to select number inside editor.
Earlier versions did not have this issue.

Scenario:

Inside cell with NumericTextBox editor trying to select value without exit from edit cell state.
On click cell, that already in edit mode, switch to read mode (NumericTextBox disappears) 

Desirable behavior:
Copy and paste to cell without exit and enter again in edit cell state.
Select all value without loosing editing cell state. 

Dojo

Bug report

Drawing API  Tooltip for categoryAxis Chart labels do not show with v.2024.4.1112

Reproduction of the problem
https://docs.telerik.com/kendo-ui/knowledge-base/tooltip-for-category-axis-labels

Expected/desired behavior
The Charts should be exported to the selected file format

The issue is a regression starting with 2024.4.1112
Environment

jQuery: 3.4.1

Kendo UI version: 2024.4.1112
Browser: [all]

Bug report
File manager grid\list view icons are flipped

Reproduction of the problem

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

Expected/desired behavior
Icons for the different views shall be flipped


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

Bug report

The download functionality of the PDFViewer component and when downloading PDF using kendo.saveAs() method doesn't work on some iOS mobile devices.

Reproduction of the problem

1. Open the PDFViewer demo or the PDF Export Demo
2. Try to export the file to PDF on iOS device

Note: On some iOS devices the PDF is exported as expected, but on others, nothing happened.

Current behavior

Currently, on some iOS devices, the PDF is exported, on others, it is exported, but there is a warning "This form is not secure, are you sure you want to submit it". After approval, the file is downloaded. On some iOS devices after clicking the button to download the PDF file nothing happens.

Expected/desired behavior

It should be possible to download the PDF file on all iOS devices.

Environment

• Kendo UI version: 2022.1.301
• Browser: [iOS XX Safari]

Bug report

The following Toolbar localization settings are not applying for the Kendo UI Spreadsheet when it is configured with a localization/messages file and/or using JavaScript:

• kendo.spreadsheet.messages.toolbar.formatTypes
• kendo.spreadsheet.messages.toolbar.alignmentButtons
• kendo.spreadsheet.messages.toolbar.freezeButtons
• kendo.spreadsheet.messages.toolbar.mergeButtons

Reproduction of the problem

1. Go to this Progress Kendo UI Dojo. It uses the es-ES messages file.
2. Open the alignment buttons dialog.
3. Open the format types dialog.
4. Open the merge buttons dialog - not in overflow menu.
5. Open the freeze panes buttons dialog - not in overflow menu.

Expected/desired behavior

The toolbar messages should be translated.

Environment

• Kendo UI version: 2024.3.806
• jQuery version: All Supported Versions
• Browser: all

Bug report

In a Grid where custom filterable ui is configured, and the filterable.extra is set to false, the data is not filtered correctly.

Regression introduced with 2025.1.211

Reproduction of the problem

1. Open this Dojo example - https://dojo.telerik.com/ARMkquiy/12
2. Filter the Start Period column by choosing "NO" in the dropdownlist

Current behavior

No data is shown in the Grid, as it appears that the logic for the filterable.extra is not applied

Expected/desired behavior

The data should be correctly filtered with the above configuration.

Environment

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

Bug report

With a Virtual-scrolled navigatable Kendo UI Grid, if you initially scroll down a couple pages and click on a row, the selection is not correct and the position changes.

Reproduction of the problem

1. Go to this Progress Kendo UI Dojo
2. Scroll down
3. Select a row

Current behavior

The position shifts upon selecting a row.
The changing event is not fired when selecting a row the first time.

Expected/desired behavior

The position should not shift, and the changing event should be fired upon every selection change.

The issue is a regression starting with the 2025.2.520 version.

Environment

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

Bug report

When the MultiSelect is used inside the Grid as a custom editor, the component gets closed on focus or when the user tries to select a second item.

Reproduction of the problem

1. Open the Dojo - https://dojo.telerik.com/oCPdsViX.
2. Click the 'Edit' button and try to select two items in the third column 'Dont work'.

Current behavior

The first item is correctly selected, however, the pop-up is closed every time the user clicks in the input, thus it is not possible to select a second item.

Expected/desired behavior

The popup should not close on focus the MultiSelect input and it should be possible to select multiple items.

The issue is a regression starting with 2025.2.520

Workaround

The MultiSelect is not closed when the downArrow is enabled (column 'Works')

Environment

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

Bug report

Grid in inline edit mode with reorderable.rows does not save changed data

Reproduction of the problem

1. Open the Dojo - https://dojo.telerik.com/XJabupcY

2. Hit Edit

3. Edit field

4. Click Save

Notice that the data is not updated.

Environment
Kendo UI version: 2025.1.227