High school expansion

Is this happening  every time they go to school? Does this happen with other households also? Try testing to see if the same thing occurs with another household also.
Also, if you use mods/cc,try moving the whole mods folder to another place, delete the localthumbcache.package and then test to see if the issue remains without mods/cc there.

It happens in all households. I use mods. I will see if I have this specific one and remove it as you suggest.

it worked thanks