I accidentally posted a duplicate bug report to this issue.
It includes my save file, a video of it happening, and the mc command center error I always get. I also had Simularity's Slower Relationship Satisfaction Decay and Lumpinou's Lovestruck: Romantic Satisfaction: No Time Decay. They're both awesome modders, but unfortunately, the fixes didn't work in my game.
@Moozilla13 I did try them separately. Thanks for asking because I totally should’ve added that. Lol. Now the romantic decay seems stable. I think what’s happening is that my sim will randomly do a mean interaction out of nowhere. For some reason, this drains their romantic relationship. And even though it looks like they’re still together, when I go to CAS they’re no longer shown as Partners. I saw that there was an open bug report for people who are still experiencing mean interactions from sims. I’m not sure if she fits the criteria that they listed, but making the romance bar drain due to one mean interaction seems excessive.
ETA: this bug is affecting my sims couple that live together. There’s another person in the household who has a romantic interest outside of the household. They don’t seem to be affected by this bug.
