Ideas
My sim freezing issue started after Installing the Nov 4th update. I'm on ps4 console no mods, CC etc. My sim froze at the start of a conversation with her romantic partner. I had her queue the 'blow a kiss' interaction but they didn't move instead just standing there staring at each other for ages so I cancelled the interaction and that got stuck and wasn't removed from her queue but her icon in the bottom right showed her doing other things like going to bed and she got the moodlet for sleeping but she was still visably standing still locked in a conversation with her partner. I had to quit to main menu without saving. It's annoying because I've had this happen before and usually they just T-pose and reset themselves out of the conversation. Another thing that might be relevant or not but happened right before this was that my sims romantic partner called their son who lives with my sim asking to come over, when I saw her partner knocking on the door I clicked on him and chose blow a kiss with my main sim and he just walked into their house. He was never officially invited in via the interactions pie menu.