[FIXED] [DU] NPCs stuck as "Graduate" after graduation after moving in/playing

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? 1.58.63.1010
What expansions, game packs, and stuff packs do you have installed? Everything except Island Living, Strangerville, Realm of Magic, and Moschino stuff pack.
Steps: How can we find the bug ourselves? Have a recently graduated classmate move into your household.
What happens when the bug occurs? The new household member never receives their diploma (even though I saw them go to graduation and they did receive a graduation photo). The end up being stuck as a "graduate" on the career screen, never triggering the bonuses and career advancements that come from being a graduate. They can apply for a job but have to start at the bottom of that career, even though they completed an advanced degree. They also are not able to reapply to college because the game thinks they are still currently enrolled.
What do you expect to see? I expected the new household member to graduate and be able to access the career advancements accordingly, just as the Sim I had played all the way through school did.
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? No

‌

I added a classmate to my household right after the last class of the term and directly before graduation. We both attended graduation together. My Sim received her diploma and was able to continue on to an advanced place in her career. The new household member however never receives their diploma (even though I saw them go to graduation and they did receive a graduation photo). The end up being stuck as a "graduate" on the career screen, never triggering the bonuses and career advancements that come from being a graduate. They can apply for a job but have to start at the bottom of that career, even though they completed an advanced degree. They also are not able to reapply to college because the game thinks they are still currently enrolled.

EDITED FOR CLARIFICATION:

He was an NPC roommate who had moved out of her house autonomously prior to the last term. This was an off campus house that I had been living in with roommates while going through school. After he moved out they started dating, then during the last term but before graduation i had him move in as part of the household so now he was playable by me. 

When the prompt for graduation came, they both were living there in my household and were taken back to campus by the game (baby went to daycare) and it did a little rabbithole into one of the buildings for the graduation ceremony and then it let them go back to their house (I believe I had to click on the house icon on their avatar). There’s no move out screen because they already lived off campus. I don’t know if there would be one if she lived in a dorm as I haven’t played a Sim in the dorm that far. 

Then this is where the first auto-save I sent [to someone helping me] starts - they’ve just returned from graduation and have the graduated moodlet. Then a couple Sim hours later a popup message comes (for her) that she’s received her diploma. He never got that message even though on the career screen it shows he is also a graduate. It’s like the game got stuck between graduation and diploma for him. 

EDIT FOR UPDATE TEST:

I also tried modifying his graduation status in the cheat screen using this cheat: Traits.Equip_Trait trait_University_PsychologyDegreeBS but nothing happened. He's still stuck after graduation but before the diploma comes.

Source: https://www.carls-sims-4-guide.com/expansionpacks/discoveruniversity/cheats.php