Got a X after reading from second user. Wifi sync does not work

I just received my BPM in Germany. Installation, wifi connection and connection to my Connect account worked fine.

 Reading sync with account just fine.

 Invited second user and accepted user invite in her account in the app

Reading - with bpm set to her Nick worked fine, but ended with X.

Software is 1.06

 Bluetooth connection to second device/account failed but that’s a feature to my understanding?

Is software 1.07 available in Germany?

 Do I really need to reset the device for update?