### Bug report

The MultiColumnComboBox is initialized without a specified value. When the user focuses on the widget and leaves it without selecting or entering an option, the "cascade" event is fired.

### Reproduction of the problem

1) Create a MultiColumnComboBox and initialize it without a value;

2) Subscribe to the "cascade" event after the initialization of the widget;

3) Focus the input;

4) Leave it;

5) The "cascade" event is triggered on "blur".

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

### Expected/desired behavior

The "cascade" event should fire when changing the widget's value via API or user interaction.

### Environment

* **Kendo UI version: 2021.3.914
* **jQuery version: 1.12.4
* **Browser: [all]

Bug report

The Virtualized MultiColumnComboBox is having an appearance issue with its row borders with LESS themes.

Reproduction of the problem

1. Visit this Progress Kendo UI Dojo
2. Open the DropDown

Current behavior

The border's alignment appears off:

Expected/desired behavior

The MultiColumnComboBox should appear like it does with the SASS themes.

Environment

• Kendo UI version: 2022.1.301
• jQuery version: All supported versions
• Browser: all

Bug report

Select event not fired on clicking over already selected ComboBox/MultiColumnComboBox item. According to the event description, it should be "Fired when an item from the popup is selected by the user either with mouse/tap or with keyboard navigation". It is fired when pressing Down arrow again when the last item is selected, but not fired if the last item is clicked.
Regression since 2018.3.1017 - Dojo introduced with the fix for Unexpected ComboBox value selection, instead of text, when an item is selected with Enter

Reproduction of the problem

1. Go to https://demos.telerik.com/kendo-ui/multicolumncombobox/events
2. Expand the widget.
3. Click on Item 3.
4. Expand the widget again.
5. Click on Item 3.

Current behavior

Select event is NOT fired.
If we expand the widget and press Down arrow, select event is fired once again for Item 3.

Expected/desired behavior

Select event is fired as with version 2018.3.911 - Dojo.

Environment

• Kendo UI version: 2021.3.1109
• Browser: all

Bug report

ComboBox and MultiColumnComboBox

Reproduction of the problem

Dojo example. Open the browser console and follow the steps below:

1. Select an item
2. The "select" event fires and, as expected, e.item and e.dataItem contain info about the selected item.
3. Press Backspace key to delete a character from the text in the input
4. Blur the widget
5. "select" fires: e.item and e.dataItem do not return data (expected)
6. Focus the widget and delete another character.
7. Blur the widget

Current behavior

After 7. e.item and e.dataItem contain data about an old selection - the item selected in 1.

Expected/desired behavior

e.item and e.dataItem should not contain data, because a custom value is set in the ComboBox and no item in the dataSource is selected.

Environment

• Kendo UI version: 2019.3.917
• jQuery version: x.y
• Browser: [all]

Hi Guys

While testing the latest v2023.2.606 release I have found an issue with the MultiColumnComboBox whereby the dropdown list items are not being rendered correctly following a selection.

To demonstrate run the following dojo

https://dojo.telerik.com/EtepUlav

Then

    - Type che into the input box
    - Select 'Chef Anton's Gumbo Mix' from the list
    - Now hit the dropdown button

You should now see the list has

    - Misaligned column headers
    - The list only shows the first 4 items
    - The selected item is not in view or highlighted
    - The list is not scrollable

NOTE: The above happens consistently under Chrome but randomly under Firefox.

Have traced things back and this would appear to be a regression introduced in the v2023.1.314 release.

Regards
Alan

Bug report

When the text in MultiColumnComboBox with virtualization is longer than tha actual width of the cell, the column get wider and is misaligned.

Reproduction of the problem

1. Open the Dojo
2. Scroll down to the item with id 10308 or 10352

Current behavior

The column width is not correct.

Expected/desired behavior

The column width should be aligned with the rest of the rows. In versions before 2022 R1 an elipsis appear for the cells with longer text.

The issue is a regression starting with 2022 R1

Environment

• Kendo UI version: 2022.2.802
• Browser: [all]

Bug report

When virtualization is enabled in the MultiColumnComboBox and the user scrolls down in the popup to load new items sometimes an item that is not actually hovered is highlighted as hovered (the 'k-hover' class is applied).

Reproduction of the problem

1. Open the Dojo
2. Scroll down to load new items. Note, that the behavior is not consistent and is not reproducible every time.

Current behavior

Sometimes random item that is not hovered has the 'k-hover' class.
screencast - https://www.screencast.com/t/KXhG7SBkE6

Expected/desired behavior

Items that are not hovered should not have the k-hover class and should not be highlighted as hovered.

Environment

• Kendo UI version: 2022.2.802
• Browser: [all ]

Bug report:

MultiColumnComboBox select event is triggered when the dataSource has items with empty text

Reproduce problem:

https://dojo.telerik.com/exAtuTUJ/6

The steps to reproduce this problem:

1. click the dropdown to show options

2. Click anywhere on the document(You will see the alert message, it prompts for trigger event).

Current behavior:

Trigger event anywhere you click on a document.

Expected behavior:

Trigger event only when you click the values in the MultiColumnComboBox component.

Environment:

• Kendo UI version: 2022.2.621
• jQuery version: 1.12.4
• Browser: all

Bug report

When using the MultiColumnComboBox on a mobile device and selecting an item the value of the widget is not changed.
This is a regression introduced with R1 of 2022 (v2022.1.119)

Reproduction of the problem

1. Run the Events Demo in Device Mode
2. Select an item

Current behavior

The value of the component is not updated. Select event is fired, but no dataItem is passes as event data. Change event is not fired at all.

Expected/desired behavior

Upon selection the value of the widget should be updated

Environment

• Kendo UI version: 2022.1.412
• Browser: [all]