I know you can escape with the menu but this happend for the second time now and maybe someone wants to look at the issue.

The first time I noticed that I rode into a not yet loaded area and I ended up under the street.

This time I auto traced, left the PC, came back and saw I was underground again.

Both times were in Calpheon but not on the same Spot.

Happened to me a lot at various places. It's when your hardware and/or internet connection is too slow to load the area before you enter. You may also hit invisible walls then. Turn down the details or get better hardware would be my suggestion. I can now play without any problems at 'remastered'.