If I remember (I'm away from my machine at the moment) your work should be serialised properly and saved into the m8 project file. So, you could try removing the mod (don't delete it just in case) and reinstalling, to check whether or not you module file has become corrupted or not. It'll be a start.
Good luck with your set.
I have also experienced some weird things about the filter mod which I've been meaning to mention. When opening files, effects are already running, but not visibly active in the module. Also not very good in a gig! Have not yet spent any time testing or reading through code to check it out though. Anybody else seen this symptom?