So I played a bunch of skirmishes / tournaments on SP, and often (10-20%) see my team mates just chillin' next to the shop or gazing at stars or something.
It seems they get stuck to the floor but still able to defend themselves, I noticed Erebus was quite happily leveling and attacking but just stuck by a flag until he got combo'd by 2 enemies.
Other times, the team mate will be stuck for the remainder of the game if he/she is in a position away from the main fights.
I've had 2/3 get stuck in one game (which adds nicely to the challenge but...)
Any chance of a locality check or periodic kick in the &^&% to get them moving ?