In-Zwift calibration speed remains zero - Wahoo Kickr Snap

Hi, after connecting to the Zwift app on my laptop all my equipment connects properly (wahoo kickr snap, heart and cadence sensors). However when I try to do a spindown the speed remains zero. Nothing happens. On the background however I can see my avatar moving…so the Kickr does control watts and speed (I also see watts and speed during login).

I’ve tried a spindown in the Wahoo app and this works just fine. But it is quite annoying that I can’t find the reason for the malfunction in Zwift. I’m always closing my Wahoo app on my phone (hard closing app, so no bluetooth connection) before entering Zwift.

Any suggestions for this problem?

Kind regards.