Posting this on behalf of Nyx, who cannot yet post due to the forum's overzealous spambot protection:
My friend first experienced this when playing with me 2vsurvival, map: black sun defence.
His windows began to freeze up and not disappear and he could not click build repeat so he pressed f1 to rebind it.
The f1 menu then refused to disappear, after trying myself in that game and then launching another, it did the same for me, although my windows were operating correctly, (unit info windows etc.) the f1 menu would not close, preventing gameplay.
I was asked to post this in the forum but have never opened a support ticket/topic for any matter so if I have done it wrong please forgive me. I have found some logs although with the amount that is in them I can't read through to see if it is correct. It is in the last 2 games (one with friend) then one on my own, I was forced to alt+f4 to exit.
I could not post the logs as they exceeded the max amount of data I can post on pastebin so have loaded them to a dropbox folder (identical copies). I have also loaded the replay although I am not sure that works correctly.
https://www.dropbox.com/sh/xb1zu5e7pdrx1ig/AACw3tmAZLXEzn2LVY25oDCwa?dl=0
Had to remove hyperlink as the forum won't let me post this otherwise, says that my post looks "too spamy"....... Just copy paste
I do not check the forum very regularly so please excuse me if me response is belated.