Just happened to me.
Though one might take a look at the replay with the offending behavior, as I noticed something.
A person did drop before the game loaded. The AI never moved it's starting unit (nor even produced any units at all). Which leads me to believe that possibly, the AI was incorrectly assigned to the next player in line (an actual player), which causes conflicting orders in units.
no because no player ends up doing nothing, which is what happen if the AI was assigned to the wrong player. the player who experiences the control issues is the one who has desynced.