After 4 reboots device works correctly
Quirck found - ZenArmor Dashboard is not comming up on the main screen
It is highly discouraged to do any early upgrades when using ZA. They always lag behind the official OPNsense release day and until you get the official ZA confirmation they're ready for the new OPNsense version it is best not to move from the latest stable OPNSense to the next.
If you want to help testing OPNsense beta and RC versions in the future simply take a backup of the current ZA configuration and uninstall it before moving to beta/rc, and reinstall ZA & restore the config once it has been vetted on the next major release of OPNsense.
ZA itself is working, verified in package Dashboard. Cloud nodes are up and running.