when one of forge servers crash we decided to not crash the client instantly, to allow you finish mission if you are in mission, you need only borderline (EA's requests) and game server, playing cards, unit commands, etc., world server (the most crashing one) handles many things among them friend list, but when the server is crashed, battleforge can not get answer and crash too. So my advice is do not open friend list, and do not use chat in games. The chat crash only few times per day, but world crash sometimes even 3 times in 5 minutes
Once crashing will be resolved, we will let you know with announcement