I've had issues before where my sim would randomly go invisible and his thought bubble would be on the floor but this is not the the same. My sim is an acrobat and any time he performs for tips or does a show he turns invisible. Any ideas as to why or what I should do?
UPDATE
I bought him a dresser and tried to change his career outfit to see if that was the issue but I couldn't add a new career outfit. I couldn't even "create a style." I could create a second outfit for outdoors, though. He was also completely invisible in the dressing room when I clicked career outfit.
UPDATE 2 After I leveled up a level in the acrobat career, and hence my Sims outfit changing, I no longer have ever the invisible problem
