Please use this thread going forward: [ARCHIVED] Retraining potion removes additional traits | EA Forums - 11595562
I've experienced this issue as well. Also when reloading a saved household into a new save, if you remove any traits, in CAS, theoretically it should open up spaces for acquiring new self-discovery traits, just like it should if a retraiting potion is used. However, the game still treats it as though these sims have maxed out their self-discovery trait slots.
Via MCCC, I combed through all hidden traits and buffs for a sim I've had this issue with and found that a hidden trait does remain attached to the sim for "max self-discovery." So it appears that even when traits are removed by one method or another, this hidden trait/buff remains on the sim that prevents them from acquiring new traits through gameplay, even when they should have trait slots available.
FYI, I confirmed that removing this hidden trait (via MCCC) does enable the self-discovery events to occur for that sim again, so this is definitely the culprit.
It still happens to me too. My Sim here has 3 additional traits from the Discovery System and when she drinks the potion to change her main 3 traits the other 3 gets removed. This is so frustrating it's definitely a bug and not by design😞
