Delete CC Thumbs won't work for walls and floors?

Hello and sorry as usual if this is not the right place to post this. I was wondering if anyone knows if Sims4Studio actually supports the batch deleting of custom thumbnails (Content Management>Batch Fixes>Misc>Delete CC Thumbnails) of walls and floors, because I can't get it work (well). The batch fix won't work in all of them (of 99 files, it seemingly only fixed 2, even if around 80% have custom thumbs). I have had no issues deleting the CC thumbnails of clothes for example. Thank you.