Product: The Sims 4
Platform:PC
Which language are you playing the game in? English
How often does the bug occur? Every time (100%)
What is your current game version number? 1.76.81.1020
What expansions, game packs, and stuff packs do you have installed? Too many. Currently missing: Eco Lifestyle, Snowy Escape, Dream Home Decorator, Realm of Magic, Journey to Batuu, Paranormal, Nifty Knitting, Tiny Living, Moschino and My First Pet.
Steps: How can we find the bug ourselves? Go to CAS, change the genetics of a an alien character at any age (make their nose bigger, move their eyes closer together, etc. It doesn't matter what you do but it should be something easily visible to see), and age them up. The best way to see it is using a teen alien sim and age them up to Young Adult in CAS or in-game. It appears to be strictly pure-alien sims only as alien hybrids remain unaffected.
What happens when the bug occurs? Alien sim loses all customized facial features and it reverts to the more default "alien sim" look (big, wide eyes and tiny narrow nose) upon aging up. It does live occur in-game as well.
What do you expect to see? I expect the sim to retain customized facial features, with at most maybe a slight extension of chins or widening of faces upon aging up. Not the structure itself changing shape and reverting to the default alien preset facial features.
Have you installed any customization with the game, e.g. Custom Content or Mods? Yes
Did this issue appear after a specific patch or change you made to your system? Neutral/Not Sure
Apologies in advance if there is another thread already about this bug, but I couldn't find it.
This is not a game-breaking bug but it is a giant pain in the buttocks to have to constantly reset and fix my alien sims faces each time they age up. Especially when I forget about the bug and don't make an effort to make a good visual reference picture for when they do age up, which leads to me losing their customized look and having to try and make the closest I can from memory.
In the pictures attached, I provide a visual example of the bug as it shows up in CAS. It does occur in-game ("live"), I just didn't take a picture of it. First two pictures with the blue alien sim are those with him as an adult (customized face) and upon aging up to an elder in the second pic, he loses his customized appearance and gets the widened eyes + tiny nose look. These pictures were taken with mods/custom content installed. I disabled mods, restarted the game and tested it again; same result. So it's not because of my mods. Although picture 2 & 3 are similar, you can tell they're different because in the one with CC/mods installed, blue alien sims has CC eyelashes, while in the third picture he doesn't.
Note that this bug only seems to affect pure alien sims, not alien hybrids (from my brief playtesting experience).