Quatix 6 sync difficulties since firmware 25

Since the update of my Quatix 6 to firmware version 25 the sync with the Garmin connect App is problematic.

I still receive the notification of new messages or email, but in an inconstant way and when I open the app the two even if connected are not syncing so I cannot upload on the app my statistic.

Sometime to resolve it is sufficient to disable the Bluetooth for some minutes and when I reconnect they start to communicate but ofter I have to reboot the watch or the telephone.

I do not perform any change in the settings of the Smartwatch or of the App.

I still have the same Android smartphone with Android 10 (Ulefone Armor 11 5G).

I'm the only one with this problem?

TIA