I edited the outfits of a sim my sim was dating. They are not part of my household. I edited their outfits and when I went back to live mode they were gone.
I thought I might have hit the wrong button so I went back into CAS to change them again, but the outfits I chose before showed up in CAS, just not live mode.
I tried changing the outfits of a sim in my household and that had no problems.
I use no mods or cc.
