We had our mirror come down and shatter a couple years ago on our 2700. It was mounted to the back of the bathroom door, glued and screwed, and appeared to be factory installed. And it happened
after we had pulled off to have lunch, and had been sitting for a while. So, really can't blame it on our jacks, probably just wear and tear over the years, from the general jolting that goes on, who knows ?
Decided we needed a towel bar there more than a full length mirror, and that has worked out well. Saved some weight too.
Jim