Hello crinrict
Sorry, let me try to be a bit clearer. Yes, this is a Seasons thunderstorm problem specifically as my sims rarely get scared moodlets from anywhere else, but it happens constantly while a thunderstorm is happening because of the infinite scared moodlet during the storm. While I am aware the storm chaser reward trait can fix this, anyone that doesn't have it is susceptible to this scenario, especially guest sims. I have noticed that while the brave trait does work blocking other types of scared moodlets, the one you get specifically from sims autonomously freaking out at a sim with the brave trait that fails to do the calm down animation will still get the +2 scared moodlet called irrational danger from that interaction even when they have the brave trait.
The Sims Team