Freezes are annoing. Still managed to get badge. I though, that bug has something to do enemy visuals, so I tried to minimize window (Win+D hotkey) right after pressing "End turn" for whole enemy turn and keeping at least 1 enemy on at least 1 cell away from my knight. Actually, I was just running around one of the first skeleton with my knight, while archer and wizard cleared the level. One free cell helped me to be sure I will be able to minimize before enemy attacks - most freezes happened on attack.
Not sure if my tactics works, but it helped me. Also - remember, that level 5 is final one and you can't transfer data to Chapter 2, so trying to just run across level maybe good idea.
 "Flagstaff: Chapter One"){kind=icon}
 "Little Cabin in the Woods - A Forgotten Hill Tale"){kind=icon}
 "Music Catch 2"){kind=icon}