well mostly browser issues where you have to quit the game and come back in just see some of the servers, after 2 patches of supposely fixing it, it never did get fixed, as well as some skin glitches in the game where certain aspects dont function right, one of the most notorious being some people can be invincible unintentionally, some mechanics of the game is broken unlike CODWAW, like nade fest going across the map literally, shooting through walls so effectively and killing, and how broken some guns are like the P90.