I’m getting the same issue even after the 2nd hot fix.
Interesting I use an add-on from ambitiouspilots that give you stats and it reports that I am currently at 10,265.
The altimeter on the tape shows 10,000.
I also use Little Nav Map to follow my flight and it shows my altitude as 9,985 currently.
Looks like two different points of truth are operating in the sim.
I turned off ATC, tired of listening to them on a long flight