Sim doesn't interact with others and instead starts dancing/twitching

Since the lovestruck update my sims keep dancing instead of doing any social interaction. They just freeze with other tasks. Except going to the toilet, they just sit there and then freeze. I tried factory resetting, removed all mods, reinstalling the game, with packs, without packs, no mods, with mods; the bug still persists. Build buy mode is normal so far but the game has become completely unplayable because i can't do anything with my sims.

Edit By Crinrict: Adjusted Title to fit old report

Edit by OP: I added an update comment for my temporary workaround, check out my latest comment / sort by latest!