On 12 Oct 2017, at 3:55, Martin Batholdy wrote:

Whenever I have a a text-file open in TextMate 2 and click outside of the window (to activate a terminal window, switch to another program, click on a menu item etc.), this ‘click’ will change my selection in the currently opened file.
So, instead of directly deactivating the window, it still takes the action as input for text-selection.

This one is quite old: Is this still a problem?

It is not something I have heard of before and don’t have any idea about what could cause it.