somebody please help me!!! My Sim ages to an Adult, but looks exactly the same.

Hi, I recently came across a sims 4 glitch that I can’t seem to fix. Basically one of my sims was supposed to age up to an adult, but he still looked like a young adult sim after blowing out the candles and/ or making a wish (I tried both). I repaired my game, deleted all custom content, and aged him up in cas full edit mode to try to resolve the issue. Nothing works! From what I’ve researched people have had problems with aging, but nothing like this. My sims even looks like an adult like as he should be when the family shows up on the map. What should I do?!