Recently I was playing against some AI, since I'm not very good I fled the planet to start a new life amongst the stars to begin an era of peace continue fighting from the moon. Luckily, I had some orbital assets left, which spotted this: It seems the AI builds giant batches of units but has no idea what to do with them. Any else encounter this?
Usual AI bahavior. Interplanetary invasion is not implemented yet so no wonder that AI cannot do it. When it lags too much and you want to play your little economy sim, make few nukes scout where AI commander is and nuke some units without killing commander. But at point you showed up there, i usually end game or try to invade such planet. AI is handicapped atm so either play against human overlords or do not use cheap tactics that AI cannot defend from, like escaping to moon and nuking from orbit. Do it like real man do and make massive robot invasion.