I had the same google sync issues before, I even tried to clean flash official global beta rom, after reboot, sync didn't work too.
So I flash back eu rom and login my mi account (normally I don't use mi acc), tried dial *#*#checkin#*#* to force google update then google syncing as it should be...
I have the same issue. It was ok but after you reboot your device, all sync stop working. Clear caches didn't help. So I try not to reboot until this Friday.
Thinking of installing Google backup transport again.
Redmi note 3 kenzo.
I don't know if it's only me having google sync issues. Already tried clean flash, installed gmail, updated google play services.
But after reboot, google sync stop syncing.( It was OK on 6.11.24 Friday Rom except gmail FC with attach file.)
I did search in official miui and there are...