In one of my current MP games i had it twice that a whole army didn't move (different turns). The commanders + units just stand still, ignore the move order and do nothing. I never had this before in all my other games.
The only special is that i used a mixed of stealth & non-stealth commanders but all got the "move" command (approved).
At least in one case i'm sure that no other army tried to intercept me. I never got a battle on the province. Mysterious for me.
