Recording of running efficiency starts late during a run

Hi there, i have a problem with my new Fenix 7, which i did not have on my Fenix 5, despite using the same HRM.

When running with my new Fenix 7 + HRM it needs some time until running dynamics data screens (ground contact time, ...) appear.

Also in Garmin Connect the data for the first few minutes is not tracked. The HRM is connected, the HR recording is also not on the watch (the lights are off).

Anyone with similar problems?

PS: I added a screenshot