This is not a problem so much as a curiosity, but I wonder if others have noticed it.
I start up a plane (doesn't matter which one) on a runway using the launcher. Then sometimes I forget and leave the sim running like this. Coming back after a few hours I see that the plane is now sitting in the grass between the runway and the taxiway. I checked the property browser and indeed there is a continual creep upwards of both latitude and longitude. Is there a known cause of this?