@Legate of Mineta
Well, thank you for the prompt reply at least. For what it's worth, this seemed to occur to me because I tried to mouse over a skill (Revision, I believe) at the moment of loading my save. My prior research into trying to fix the issue suggested similar causes for others (interacting with UI).
That said, sounds like it's a dead issue. Given how miserable it is to lose a 40-hour save and the fact that it seems unlikely Year 2 will see release this decade, if ever, it would appear my relationship with Academagia is at an end.
That's what I get for messing with Gates, I suppose.