Same here, if one of my sims (they are married) is already in bed asleep and the other sim then tries to join them they will cancel the action and wait by the bed while the other sim then gets up. They then get back in bed cuddling but do not sleep and either one of them glitches into the middle of the bed while the other just stands outside of the bed or they both just get up and don't sleep. I have to either have them sleep at separate times of tell them to sleep multiple times after trying to stop them from cuddling. From what I've read on here the cuddling issue was apparently fixed in a previous patch but that doesn't seem to be the case for me.
