Solved

Driver level just dropped & star Level drop

Driver overall level just dropped & star Level dropped also (Sometime in last 24 hours)

One was level 15 or 16 & he now level 14.
one was level 13 and he's now level 11 Plus same with reserve.

There star levels dropped by approx half to 1 star also.

I have NOT leveled up, ive been level 15 for a while.

whats up with that? Are they slower? confused...

hey jack. I had a driver. It was on the old igp. I still have him on shortlist. I was going to get him again. But it says that i cannot because of the level. Any possible way I can get the driver. Im level 10. But it says that the driver I had before is level 11.

Levelling is fast at your level, just wait up to 7 races and you'll be able to hire him.

Alright

Here's mine that did the same a few days into the game went from a 5 star driver to a 4 and 1/2 star driver between the race start and the race end https://igpmanager.com/app/d=driver&id=573095

Star ratings change with levels but I have noticed they also change once you have certain amount of xp points too before you level up. That might be the cause of it.