https://bugs.winehq.org/show_bug.cgi?id=33324
--- Comment #3 from 10mkudela@gmail.com --- I'd say that ~80% is fixed now. Alt-Tab does not freezes game completely, however when I put my mouse on other screen while out of game and then try to go back it gets confused.
Also Alt+Ctrl+Arrow causes some issues, but that's more likely be on Gnome site. Twice Alt-Tab fixes it.
In some other cases such as when you "free" mouse in game (read make it not move the camera) and then Alt-Tab somewhere you will also need to do it twice again
But in general (besides those issues) bug is gone. So if it will be still considered bug - Importance can be reduced.