Not sure if its the game or my laptop (its an older laptop but I've never had this problem before so I doubt it), but I've had several problems playing since FAF updated after a long time without playing.
1 Sometimes, everything just stops. Forged Alliance itself isn't frozen, but the game stopped. Units, projectiles, the game clock, everything is frozen, but I can still give orders, open menus, etc...
2 Some units don't behave properly on Co-op maps. Movement and attack animations don't happen, the units will stop and face the target but they don't attack despite sound effects playing (sometimes on a constant loop long after they would have stopped attacking due to range or something else destroying the target) I've noticed this mostly with mod units, so at first I thought the mods were the problem, but then I realized that a few base units were doing the same thing.