Navigation issue following a planned route

Recently (last two weeks) during navigation with a planned route, I've seen a new behavior of the arrow that indicated my position in respect of the route.

The arrow that indicate the runner position is in some way locked on the route that I've already pass. In the meanwhile the line that indicate my recorded track is ok and indicate my real position.

This behavior continue for some kilometers and after that the position arrow return to the right place at the end of the recorded path. 

For my this is an issue, probably appeared from 18.xx software version.

Have someone noticed this behavior during navigation?