From test on this campaign author :
http://steamcommunity.com/sharedfiles/filedetails/?id=802767761&tscn=1481224690

We have detected there is something wrong with HandleDamage event handler. When player is supressed, sometimes he is doing 180 degree, facing his back to enemy, without user interaction. Issue seems to be very strange, it looks like it broke all older missions (created before 1.66)) which were used this event handler. Its pretty major issue, as player cant stand a chance against AI.