@joseph No I have not set it to maintenance mode and I have not plugin installed.
Just right now I received update notification in Nextcloud I updated it and it worked flawlessly. But this time not mounted nfs volume, it was kept to default.
@BrutalBirdie I can confirm 100% that it is working without any problems and updating well when not using nfs volume mount.
Next time I will mount nfs volume and check.