AI in Lan or in Lobby multiplayer does nothing

Tried to play a coop game with friends against the AI but no matter the difficulty settings, the AI does really nothing at all. its like all the difficulty settings are on Easy. Only make few units, barely any villagers, making it way too easy on Hardest too. It does work well in singleplayer, but somehow in multiplayer the AI just doesnt want to play the game. Is there a fix to that or its a permanent bug