I have figured out why most of the combats freeze, instead of completing. Any skill use in a combat doesn't work correctly, damage doesn't show and the Morale doesn't reduce. If the use of a skill would kill a figure, it stays on the screen, if that was the last opponent, the screen freezes and you have to refresh to continue. This is very annoying and why most Boss fights are an issue, since they have larger HPs, and thus skills are more likely to be used. Hope this helps you to fix the problem sooner.