No distances measured with R10

I made a first try with my new R10 today. Firmware is up-to-date (4.30), Golf-app is also up-to-date (2.10.0.9).
The device had no problems recognizing the shots.

Problem:
All value were shown except the 3 distance-values (total, carry, deviation). I made about 40 shots, not a single distance has been shown within the app.

I have no idea, what I did wrong.

btw: As far as I know, I do not need ‚Home Tee hero‘ for this (wouldn’t have bought it otherwise).