I noticed something very strange. Area 1 breaks after installing ZeroTier Package on a core router where several OSPF areas concentrate with the backbone all other areas work just fine. On the router connecting to Area1 I can see all routes under LSA but the core neighbor router is not detected and routes do not populate.
After disabling the zerotier package the problem resolves.
No idea if this is a bug or misconfiguration as I just switched to V7.