Old thread.
Just noticed my 13 P85+ did this twice today. At first I thought it was due to a leak, but when I saw it lower after parking in my garage, I knew this was supposed to happen by design or software.
Many have said it was a bug in several other software variants going back to 5.xx and probably before.
To me, plenty of other vehicles do this with air suspension, 18wheelers included, and that's from when they are stopped at a light even.
To those of you who park over the barriers, you're asking for issues, Tesla or not. If you care about your car, or vehicle in general.. Don't park over them. If you have a suv or truck with the ground clearance.. By all means.
Just wanted to update on the "issue".