The Kendo ContextMenu widget is automatically closed when the user clicks anywhere else on the page. This is done by subscribing to the "mousedown" event on the document. However, when you use TAB or any other way to leave the menu without triggering a "mousedown" event, it stays open forever. This behavior can be reproduced in all examples and DOJOs.
I would instead suggest closing the menu as soon as it looses focus.

Bug report

The sub items in a Menu only open the first time in IE when scrollable is set to true.

Reproduction of the problem

1. Open this Dojo example in IE - https://dojo.telerik.com/epUjAzaM/3
2. Hover a subitem in Item 1 or Item 2
3. Hover the subitem once again

Current behavior

The subitems open only the first time

Expected/desired behavior

The subitems should open every time you hover them

Environment

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