Thanks for the image.
Please attach images in the forum posts and include the route url.
There are not so many announcements at all these distances.
(…, 1 km, 300 m, before the turn)
There is no voice guidance for returning to the route.
There are visual indication and off route alarm in settings.
When you leave the route like in image,
then after a while it announces route missed and a rerouting happens.
Next time it would be useful to see the display and take a screenshot,
so we can understand what happens and the app displays on screen.
(and see the exact location of GPS marker and its direction)