Komoot app for Garmin - distance cut in half

I went for a hike yesterday using Komoot app for Garmin on Venu 3 watch. I followed a route previously planned in Komoot on web.

After about 2.1 km the watch stopped increasing distance travelled, and for the next cca 4.5km it showed that number of 2.1 km as the total distance travelled, after which point it resumed tracking distance for a total of 4.38 km acummulated tracked distance (obviously ignoring 4.5km travelled between since it stopped increasing distance traveled until it resumed again).

The result is the gps track that is correct, but the total distance is cut in half, 4.38 km recorded vs 8.6km planned.

This part of the route is ignored in total distance:

This is a major problem with Komoot app for Garmin, and a deal breaker for me, because when this activity is exported to Garmin Connect it will account for drastically lower distance. 

I have paid premium subscription for Komoot because I wanted navigation with maps on Garmin Venu 3, but I didn't know I had to settle for distance travelled cut in half.

Anyone else with similar issue?