::Edit:: Seems to have been a memory issue. I cleared local saved data and on restart achievement was unlocked, along with a few others.
Fix steps
Settings>System>Storage devices>Clear local saved games
Hope that info helps someone in the future. This can be closed now. ::Edit::
Platform, device version and operating system:
Xbox series x
Screenshot
What you were expecting to happen, and what actually happened:
Achievement unlock, nothing happened
I’ve reached and surpassed level 100 but the Achievement is stuck at 80% and locked.
How often does this happen? When did it begin happening?
I’ve gone 18 levels past the unlock point and still nothing.
Steps to make it happen again
I reached level 80 a year or two ago, stopped playing the game, recently came back and reached level 100.