As the last resort I removed the entire cluster with everything, installed the nightly - latest build of Realm, cleaned the project, restarted my PC, removed the local database and just tried to connect to a clean database - it creates the schema, but that’s all, when it reaches
await _realm.Subscriptions.WaitForSynchronizationAsync();
the app hangs indefinitely - yes, I waited for hours.
I am going to postpone my transition to online version until I finish the other things, I hope in a few weeks this issue gets resolved somehow.
@Ian_Ward thank you for your effort.