Houses/Lots Disappear

I was playing in one of my save files where I have two family’s who live across from each other. I finished doing stuff with Family 1 and after saving and going to manage worlds I click on Family 2 and the house just goes away.

like it’s gone. So I think it’s a mistake I click into it and nope, everyone’s just standing outside. So I rebuild the house all is well. Then I take a sim from that house and we go to Thrifttea and the second I get there the lot is gone as well. There’s nothing there.

I leave quickly and go to the library in Copperdale and that lot disappears too. In manage worlds it’s just gone there now empty lots, but I never did anything to delete them. I thought it was super weird and that has literally never happened before. 

I haven’t used any of my other save files yet, cause now I’m worried more things are gonna disappear.