I've also been running into the same problem where specifically it seems to be 5 minutes after logging in I get disconnected. During those 5 minutes I can play perfectly fine without any noticable lag but all of a sudden I d/c with the 90002 error.

I can immedietly log in afterwards regardless but I can't seem to stay logged in for anything longer than that. Kinda regretting I resubbed at this point.