How come they get to make "The Invisible-Sim" and we can't? lol
Too bad we don't have the movie star expansion pack...
Anyhow, if it was me i'd do what was said and try reloading. If that doesn't work see if the game needs updates? Maybe clearing the cache? I'd say update the video drivers, but if it's only doing that in the Sims 4 then i'd say it's in the game itself. Can't hurt to try imho....