We have faced the issue where writes are not immediately visible sometimes. So we are not able to create unique nodes. I saw a similar post in discuss
it seems like dgraph is eventually consistent or i might be wrong.
Are you working with multiple clients? or does your client is unable to read its writes?
We have multiple clients.
As you learned from other threads that the team is going through a transition and also I see that the other thread you referred has no resolution.
But according to a recent update in docs doc it looks like to me that mutations should be visible to every client. Please file a github issue so that this issue is tracked.