Lags & Invisible, Frozen & Stuck Sims --> Post here if you have the issue.

Side note on the invisible sims I've had. One turned invisible and then turned visible again, on her own. And in another game, the same thing, after turning invisible, he became visible on his own.

Also, I have never seen thought clouds over my invisible sims. When they are invisible, they are GONE. I did instruct the Mr in one game to get the mail after going invisible, and he did, the mailbox opened, was open for awhile, and then was closed, all without seeing a person or a thought cloud doing it.