My sim won’t sleep

I play mod free and I’m having this problem intermittently with my sims no matter where they live. I think it’s a bug. For now, I’ve just built it into my story. I pretend they are struggling with anxiety and isolation as their fame increases. My sim is friends with Vlad who has super comfortable beds so I just go crash there. Once I come back, it seems to have reset the problem and her sleeping goes back to normal for awhile. Hoping this gets fixed with the next patch!