Yes, I am seeing this as well. Pilot George will climb and will not stop. I've let him climb as high as 5k just to see how high he will go.
This happens to me on every map. I ask George to hover at any given altitude and he always replies with, "coming up". The only time he will actually descend is if I set the requested altitude to zero. Once he touched ground. I'll request him to hover at ten feet. He'll respond with "coming up" followed by locking altitude". But he does not stop at ten feet. He continues to ascend.
If I ask him to go up to twenty or any altitude above, he will continue to climb right through the requested altitude. If I ask him to descend, his response is always "coming up". This happens on any map, at any airspeed, any configuration - lightweight or heavyweight.