Solved
[CURRENT ISSUE] Aging does not fully revert when quitting without saving
It looks like more code has been broken again:
If you have any Sim transition into a new life stage, but then quit without saving, they will revert back to the original life stage they transitioned...
I will be marking this a solution for visibility purposes.
EA is currently investigating this issue and has been able to reproduce it. For now, if your Sims age up, please save the game to avoid this bug.
Keep in mind that this may also happen with any other physical changes to Sims, such as quitting without saving after becoming an occult; I don't have much info on this but will try to reproduce it myself and post an update.
For anyone else experiencing this issue in the game, please feel free to post your findings in this thread.
