I once was sending some marines in subs like a small stack of about 20 but suddenly right before the end of the turn I clicked end turn and the game just froze for about 7-15 seconds and after the next turn started I noticed that my units had been labeled with the Number ( 0 ) instead of 20 I could see the spot of the units and all my units just disappeared I could not move that ( 0 ), could not attack it or do anything even by clicking on it... It also blocked routes... So it is physically affecting or in the game...