fenix 6x pro 24.81 (beta) doesn't upload data to phone (sync failed)

this Saturday I saw on fenix 6x pro at first time "sync failed" message and I can't upload data from to my phone (Android)

What I tried?:

from phone side:

- start sync manually - no result

- turn off/on bluetooth - no result

- reboot phone - no result

from fenix side:

- start sync manually -> "Sync already in progress"-> no result, some time after "sync failed"

from fenix side helps only reboot, only when I reboot my fenix and it causes data synchronization after initialization with success, but all attempts after will fail.

Please help.