This issue has gotten worse for me recently, to the extreme.
I tested the severity by using the positive romantic relationship cheat. In the following screenshots, note the romantic relationship bar on Shawna and the in-game time. Over the course of about three in-game hours, the romance bar goes from fully positive to fully negative. No matter how many times I use the cheat to bring it back up to positive, it decreases at a consistently rapid rate.
(For those wondering why the Sim's legs and the alien infant are in the exact same place in both screenshots, it's because they're experiencing another, separate glitch that I get every now and then in which Sims just kinda stop doing stuff for a long while.)
Needless to say, I can't play this household anymore, which is extremely disappointing because it's a legacy challenge household and I'm three generations in. This glitch has occurred in every single household I have ever started for months and months now. I have been unable to find any workaround, cheats and mods included.
If this glitch doesn't get fixed, I will likely just drop the Sims 4 altogether. For someone like me, who focuses on the story aspect of the Sims, this glitch makes it utterly unplayable because all romantic relationships between Sims are doomed to fail. This thread has been going for nine months now, and seeing that there is no sign of improvement is disheartening. I am very grateful to the people who try to help with stuff like this, please don't misunderstand, but I feel I must stress the severity of this problem because it's gone on for so long.
