I've got a problem with sims doing their 'surprised' or 'scared' jump at random objects, like the other day, one sim kept jumping up whilst looking at the bath, and the toddler was 'crying softly' with a picture of the bath up the top, like the bath was a person who had died, but no one had just died

Also they are doing it when there is nothing there at all. I seem to remember reading about this problem ages ago i.e. sims getting spooked at random objects but can't remember what it said, have searched via google, on mod the sims and on here and can't find anything. Its been happening quite a bit. I hope I have explained my problem properly. Does anyone know anything about this.