Column menu throws an error

[gyankov]

Bug report

After the fix of Root Menu item is not opened, if hovered before close animation completes issue, the column menu throws an exception after selecting an item right after it opens. More details can be found in ticket with id 1509810. The error is also reproducible in Gantt Treelist on demos.

Reproduction of the problem in Gantt

1. Go to https://demos.telerik.com/kendo-ui/gantt/events
2. Expand the column menu of Title column
3. Click on Sort Descending

Current behavior

Uncaught TypeError: n._closing.find is not a function

Expected/desired behavior

No error and Title column records are sorted.

Environment

• Kendo UI version: 2021.1.224
• Browser: all