Two repeatable bugs, annoying ones.
When I leave the game open for some minutes without doing anything (like I go to make a coffee for example) when I come back I have :
1/ a black screen if I launch a battle. Only way to be back on time is to CTRL+ALT+DEL then disconnect and reconnect. But often in this case when I'm back in battle you can control the plane
2/ If I try to exit the game after idling the game stay frozen on the exit menu. Also here the only way to leave is the same as in 1 because if you switch windows nothing works ...
Many bugs ion the game it seems ... and I haven't spoke here about sound issues ;)