Played Sim creates new outfits

I'm sorry, I missed your reply. For me:

• Yes I do use mods. It happens to households I am not actively playing so I don't see it happen right away and don't know how to trigger it. It has never happened to premades (aka the Goths), its only my played sims. Also, I play with story progression turned off so my expectation is no changes to them at all while I am away. I only had that weird issue with one appearing to be an elder that one time months ago so that is probably not related. AFAIK none of my mods are intended to affect CAS in any way.
• I play on PC
• "are they actually created like this: Played Sim creates new outfits | EA Forums - 11879522 or are they just wearing them when you play other households ?" NO. They do not create an outfit, they are simply wearing things I never assigned that do not show up in their saved outfits at all. I see others mentioning changing clothes in CAS and it not taking, but that is not my issue. My problem is a played sim showing up wearing something new either when I see them out on the town or when I come back to play them. Both things happened again while I have been obsessed with my royals. In one case, a sim showed up as a random door knock visitor but had on clothes I had never seen before. I switched to that family and he was still wearing them but it was not one of his outfits nor was it different swatches of his own clothes. They were from regular cas vs costumes or uniforms but I didn't think to check the clothing category they came from, He should have been wearing his normal weather base outfit like the rest of the family had on though. This is the second time this same Sim has been found dressed wrong. In the other instance when I logged back into a family a sim was wearing one of the work uniforms that comes with jobs but he is and always has been unemployed (it is my ranching family and their farm is their only job). Again, it was not a selectable outfit, he was just wearing it out of the blue. In both cases I was able to have them change into their normal outfit without issue.
• "Did you get any Sims through Cupid's Corner ?" I do not have Lovestruck.

When it happens again I will save a file with them dressed wrong so I can send that to you.