Solved Had some weird bug with chat today

At some point, chat became freezed (you could no longer switch chat tabs anymore), and i pressed chat settings cogwheel... But you could not be able to close settings window, neither by "ok" or "cancel", so it stayed on top of everything and also prevented to use "escape" for main menu.

I managed to get out of this situation by changing server (without it, i would have to task manager process of game, or maybe disable internet to auto-disconnect).

First time this happened to me.

 

I've never seen this, so it might not be a bug but some corrupted file on your client. Try cleaning your Cache or running a Force Check.
If you ever come across this again, issue a Bug Report with proof and steps on how to reproduce it so we might try and check if it's indeed a bug or not.