Same here, my sim put her infant to bed then suddenly stopped working. No menu comes up when clicking on the sim and whenever I have the infant ask for food or diaper change my sim goes forward then starts waving her hands like something is blocking her path (nothing is blocking her path btw)
I've repaired my game and issue is still there, I've removed my mods folder and the issue is still there, only now my sims is marked as "neighbor" when hovering over her head.
Been playing all day and this issue started somewhere around 30 min ago.
edit: I'm on pc but playing through EA launcher, never played through steam so it's not a steam issue since OP tagged as playing on steam.