Map not rotating to follow direction of movement, after turns

[Francesco Puccettone]

During cycling navigation, with the compass set to follow the direction of movement, I noticed that, after a turn, the map sometimes only partly rotates, such that instead of the direction of movement pointing upwards again after the turn, it is instead pointing at some other angle. 

I noticed also that a tap on the screen will rotate the map as expected(?!), however to keep doing that during cycling is unsafe and inconvenient. 

Is this a known bug?