"Stay on this page /leave this page" when leave menu focus

Hi,

When I visit in the back-end the menu and even when I do nothing in the menu, every(!) time when I leave this by clicking in the menubar on the left side a other item, like page, posts, media, ….a pop-up shows-up.

Disabling this plugin does help and the problem does not exist.

https://wordpress.org/plugins/menu-icons/