I think a lot of people have had this problem unfortunately, I remember it happening to me and searching on the forums for a fix. The game basically autosaves back up files and you just have to change the most recent one before your current save file to your actual save game and you'll need to redo the fight, like I think I lost about 20/30 mins of game play and had to redo it and when I did on the new file it worked fine and I didn't get stuck.
Hope that's helpful, if you search about the glitch on here I think someone went more indepth about how to change your save game.