@Con-Hennekens
Thanks for the answer!
#1 The continuation of a running route must work. A workaraound with pause and resume makes sense if the pause lasts a long time and I'm travelling far (how far is that?) from the route. A pee break is not part of it for me.
#2 Actually, my concern was that the route calculation must not fail at any time as long as there is power in the battery. It shouldn't if it automatically switches to offline
<Route cannot be calculated> is already annoying in a car and dangerous on a motorbike.
Displaying the original route takes away a lot of the anxiety, which is a great feature.
#3 No answer on the subject of poor online connection.
A smartphone is also online with GSM. However, the connection is so poor that online route calculation is not possible.
My suggestion: Switch to offline if the route calculation fails. I.e. when the above-mentioned error message appears. Regardless of the online status displayed.
A lot of words, but I think the #1 route software you are developing is worth it.