Menu slow to load or freezes on asking to join sex

[Ravanche]

Group sex, even with threesomes, makes all of the menus incredibly slow to respond. With just two sims, it loads at normal speed. For each successive sim it gets progressively slower to load. Tried 6 sims, and it took over 5 minutes for the options for sex to appear. Prior to this Sims 4 update it wasn't an issue at all.