Yes. I first got this issue shortly after bringing a family into CAS to do a slight edit, from the Manage Households panel. I had activated cas.fulledit mode. I believe I also saved the family to my library, but forgot to save the change in my game itself. But when next I went into my library, one of the cats in the household was blacked out. I had only edited the one human Sim, however, I hadn't even touched either of the animals. Restarting my game fixed it.
After it was fixed, I decided to put my old Tray folder back into the game. I had already taken out all of my mods, saves, tray, etc. before downloading Cats and Dogs, and had deleted my cache files and localthumbcache. I had even done a repair of the game before downloading to make sure the game was fresh, so I could gradually add my folders back in once I knew the expansion ran smoothly. When I loaded my game after adding a copy of my old tray, some of the characters were blacked out. I have a lot of households and the majority were fine, just minus the CC, but certain characters, even in mixed households with characters who were fine, were blacked out. I exited the game, deleted that tray, reset my Sims folder and did another game repair, and put in a brand new copy of my old tray folder. Still has some characters blacked out.
I have a good PC system, Nvidia GTX 1080 video card, i7 7700k processor, 16G ram, windows 10.
I feel like this may be some kind of mod/CC carryover issue, perhaps? I'm no expert, but so far it seems to be happening to people who initially used CC/mods, even though they removed the folder before playing.