You can do so by clicking on the flag once the track is completed.
22 days ago
I was part way through the route and we had to change our plans.
Opened my app drawer.
Closed all the apps.
Still had navigation icon in the top left of screen.
Tapped it and app was still running.
Now all other apps and notifications close if I swipe it.
But this one didn't, which is why I reported it.
It is expected behaviour for android users.