http://bugs.winehq.org/show_bug.cgi?id=32255
rob mysystemp@gmail.com changed:
What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED Resolution| |INVALID
--- Comment #2 from rob mysystemp@gmail.com 2012-11-20 12:28:48 CST --- Yes sorry, you're right. I've just checked it and the issue appears only when texture quality is set to low.
Also tested on win 7 OS. Same result.
So this behaviour is intensional (when the game is paused, it's added some kind of blur effect and because it's set on low it doesn't draw anyting, but that's just speculation) or Dota's bug, not wine.