I have this problem but it comes and goes - the thought bubble that gets excessive changes too - I have had the pillow, the red sports car, a money sign, etc. When it happens - it overlays on top of their real thought. Even townies will get the thought bubble. It seems one sim will have a thought and it gets stuck or something and overlays other sims thoughts. Like I think the pillow one started when one of my sims first started playing a violin and the sims around got the pillow thought because the sim was playing badly and they wanted to cover their ears with a pillow - that is normal, but then it starts popping up for all the sims on top of their other real thoughts for a long period after. I am playing a challenge so I do rotate to different households and all of them have at least one cat. It does not always happen - sometimes it goes away. I think when I play for a long period is when it happens the most. I tried to attach the save but it says unsupported extension type and I know nothing about Google drive or One drive - sorry.