Hello I just figured out that if I keep the phone in the hand while driving and move it a bit the map will follow instandly without any interruptions. If I place the phone on the seat and car is driving smooth it stops working. Picking it up again and move a bit map is moving again. In the debug mode I can verify this behavior. As long I am shaking a bit (should drink more beer) the phone the movement is detected and it works. So driving on the motorway without bumps might stop the map moving. Hope this info helps.
Thomas
