Route time calculation off when replanning

In the app, the time for a route keeps doubling in every edit step.

To reproduce:

1) Create a route on LoMaps with the LoMaps offline planner and the "car fast" profile

2) Store the route (The route statistics now show distance (4 km for example) and time (7 minutes)

3) select "recalculate route" so the route opens in the planner.

4) Move the intermediate point slightly, so now the route consists of 3 points.

5) Store the route and select "overwrite"

6) The time for this route has now doubled (still 4 km, but now 14 minutes)

Repeat the process to get infinite time.