I am not really sure whether to post this in here, because i don't know if it's a bug or a performance related issue. I tried searching the forums (and googling) for the same issue, but to no avail.
Whenever i play BG:EE online with my 2 mates over Steam, it has the tendency to freeze after ticking the V's and clicking the Start Game (or w/e it's called) button. It only occurs when we have to re-load (after dying, etc.). All three of us get the windows notification: Baldur's Gate is not responding. When starting the game for the first time, it works fine. The freezing does happen every other time, meaning that we all have to completely reboot the game everytime we want to re-load. Very frustrating.
Adding to this: whenever i play together with 1 friend (so 2 players), everything works fine every time. On both occasions i am the host.