Cascade event fires without a change

[kendo-bot]

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/@sspasova/UYAqobut

Expected/desired behavior

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

Environment

• **Kendo UI version: 2023.3.1114
• **jQuery version: 3.4.1
• **Browser: [all]