diavolosims I would guess no one answered because no one has anything helpful to say. I would suggest instead posting in the Bug Forum on Answers HQ, which is currently the location EA employees use to gather information. This site is still a beta.
https://answers.ea.com/t5/Bug-Reports/bd-p/The-Sims-4-Bugs
It may be that a bug report already exists for this, in which case your post would be merged. In that case, you could subscribe to the master thread for updates, or provide your save or any other info requested in that thread.
Please do test with no mods or custom content present, if you haven't already. Bug reports need to be from a modless save.
Hi, and thank you for replying! I did actually make a thread in the Answers HQ. I made the post side-by-side to this one, and I check if there's any similar experience from other players, or if there's an already existing thread about the problem. But it seems like they know one's ever noticed before, maybe? I have further checked other non-personality traits like the different Grief-types from Life & Death, and different Fears, and those too save. Reward traits such as (Un)happy Infant, or Low/High Self-Esteem saves; degrees from Discover University, an older EP than High School Years, save but is now placed under their own Degrees tab instead of a trait (must be updated somewhere down the line). Lifestyles from Snowy Escape save; careers save; household funds sort of saves if you enter CAS before placing them to a lot rather than going to the Gallery and placing them immediately to lot.
Lastly, Milestones from Growing Together save, although these bug out themselves by placing newer ones after the older ones in most cases. And if saved and imported to a saved game, the sim's milestones would turn generic, losing any sim, place/location, or trait referrals (ex. "<ThisSim> fell in love with <ThatSim>" will turn simply into "<ThisSim> fell in love"). But back to High School "exit" traits, these traits are probably the only traits I know of that do not save in the Gallery once placing them again. I will always have to re-add the trait/s via a mod like UI Cheats Extensions if I have to. They would always revert to the typical High School Graduate rather than keep their custom High School status, whether they graduated with honors, a valedictorian, or dropped out of high school, or even got expelled from it. Once the sim turns Young Adult, saved into the local Gallery, then placed to a new game - new saved game - it won't save.
