I didnt do any thing ! What more fun why I besiege NPC after Loading to map almost all my units get this green ****, all enemy NPc units too got green thx to this i win fast with 2 wardens ;p.
One time I send my units to tow to heal after fight, i go to town and after log thy got gree .....
I DIDNT change formations.
And now I dont see some of my units ...I can click on them but dont see them, again need restart game.