I've had the same happen on V0.30d with 74 WC going to 10 WC;I thought I had fixed this but it seems I hadn't. I'll take another pass at it.
the trigger I've found is:
Sunday midnight: Porn with Alex and Haily > 'Bukkake Hight'
the scene grants "World Corruption: Haily Handjob" and "Lina Nerve: A and H Handjob"
::EDIT::
Did some more testing, and I think I'm dealing with a save compatibility problem (given that the save was started in nov. of 22, it wouldn't surprise me). Unlocking some world corruptions won't increase the visible count (74 in my case) while others reset it to the nr. of uncounted ones (or a nr. related to them).
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