I drive by announcement, by the way, and just read the new (and excellent!) report on that topic.
I may find some useful info in that!
This morning I could not state whether
gps/navigation had lost me or
I had left the route.
Either way, I now figured out what annoyed me:
I had hoped that I would be rerouted automatically from any point when leaving the route.
I have heard the warning beep (“lost signal or left route?”) and waited to be rerouted - either back to the original route lost just before,
OR to a new (and equally “kurviger”!!!) route.
Gathered now that I hear the beep until I find original route myself, which I do not understand…