When in vehicle mode and travelling at about 72 kph (45 mph), setting the Autozoom control to enabled causes the map to cyclically zoom in and out. The vehicle is on speed control, so actual speed is quite steady. Appears Autozoom function needs some (or more) hysteresis. Navigator version 4.0.27. Android phone.
I have the same problem, but for me it only occurs from about 3,6 km to about 3,0 km before next maneuver. Outside this distance to next maneuver I have no problems with the autozoom.
The problem occurs in Navigation mode and in Simulation mode.
Samsung Galaxy A5 2017
MFN version 4.0.27 (but I have seen this problem in earlier versions)
I have installed version 4.0.28, and it is running well on Samsung Galaxy A5 2017, and the zoom problem looks like solved, (only tested in simulation mode).
When you try clear install of beta version from GP there is problem with white screen, but when first install 4.0.27 and then update from GP on version 4.0.28 mapfactor run well.