Bug with tattoo on vampire’s dark form

I encountered a bug where, if you apply a tattoo to a vampire’s dark form (with synchronization with disguise turned off — I wanted the tattoo only on the dark form, not the normal one) and then save the Sim to the library or start the game, the tattoo completely disappears.

Even though it appears in the library preview, once you load the Sim from there, the tattoo is gone. It’s really disappointing — I spent a lot of time on this! 🥲