Freeze after Battles During End Turn

I'm playing unmodified M2TW with Patch 1.2. Last night, I loaded up a save game, having last saved it when the AI attempted to relieve a besieged force at Nottingham, with the game saved during the battle info screen. So I fought the battle, won it, and had my ransom request for their prisoners denied. It was the last turn before the settlement surrendered, so I should have then conquered the Citadel. But instead, after I executed the prisoners, the game froze. When I say froze, I mean that it got stuck while still during England's turn (the faction that just attacked me). My General made his usual attacking animation on the Citadel that they do every once in a while, but the end turn phase never got any further. It just looped with that stupid attacking animation. For some reason there appeared to be an English General standing in Nottingham Citadel, actually visible on the Campaign Map. So after a full ten minutes I loaded up and auto-resolved, and it worked fine, until it reached Egypt's turn...

Anyway, what I described above happened now at the Citadel of Gaza, with Egypt attacking me to relieve their force in the Citadel. The only difference was I executed their prisoners upon winning the battle, but the game still got stuck in the loop described above. Again, I had to reload it and try again.

I noticed all this once before having fought a battle against the Mongols in a previous campaign, but I thought it was just a one off.

So, the bug I am reporting is that if you load a game that was saved during the end turn, it seems to get stuck after fighting a battle, in particular a sally with a relieving force. I've played plently of battles without this happening, but its pretty annoying having to worry if I will lose my heroic victories as soon as I have fought them.