A follow up
I took Ray's advice and ordered a new mount. $15 for the part and 20 minutes to install it. The replacement was straightforward and easy, I just searched YouTube and followed the steps I found there. I flew yesterday and the camera performed flawlessly.
To answer the question, I don't know how many times the camera has been off the drone because I don't know how many times I've calibrated the compass. I do know how many times it was reinstalled crooked, which is zero.
The H fell out of the sky in May and I had only flown once or twice since I got it back. I suspect but do not know for sure that there was damage to the mount which was not noticed during the repair. I can't complain as the repair was covered under warranty, and that only because Yuneec retroactively doubled my warranty period several months after I bought the drone.