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? 1.52.100.1020
What expansions, game packs, and stuff packs do you have installed? ALL
Steps: How can we find the bug ourselves? Go into CAS, create a mermaid, go into human form, unlink forms (where the human form won't change the mermaid form), randomize eyes or other feature, then use the random traits button. The mermaid form will disappear. And I tried the mermaid kelp in live mode with the sim and they still can't be a mermaid. It completely glitches them out from mermaid occult.
What happens when the bug occurs? Mermaid form disappears.
What do you expect to see? Mermaid form to stay.
Have you installed any customization with the game, e.g. Custom Content or Mods? Not now. I've removed them.
Did this issue appear after a specific patch or change you made to your system? Neutral/Not Sure
See attached video:
You can see me unlink the forms, randomize the eyes, and as soon as I hit the random trait button, the mermaid form disappears. This is completely vanilla folder. Mods have never even touched this folder.
https://youtu.be/yDJoaQdCZR0
ETA: You dont' even need to unlink the forms. It still drops the mermaid occult with forms linked or unlinked. Vampires and Aliens don't drop their occult, like mermaids do.