Pet skins have defaulted to black base all over?

I adopted a cat in a save file a number of days ago and they had two kittens. When I updated my game on the 1st of July, there were no changes to their appearance. Today I've opened the same save file (3rd July) and all the cats have had their names totally reset and are all just black in colouring - no details or layers. As a note, I also don't run any mods for the game on my PC and I have no CC installed. The cats had been edited in CAS mode before the update. Has this happened to anyone else?

I don't have any images of the cats before this happened, so I've just attached the images I've taken for posting this.