Atlaskit editor-core - problem with user mentions and attachments

Hi,
We have a problem running attachments and user mentions in the editor-core from Atlaskit. Maybe someone is more lucky in achieving this? The examples on the Atlaskit documentation page are not very helpful in this case.

Did you manage to find out how to do this? My mentions never want to use the mentionProvider since they’re all marked @unknown ahead of time.

Even pulling the whole @atlaskit source from bitbucket I have no idea how Atlassian makes it work for themselves.

Edit: Sorry Mr. Unknown. Guess that’s an interesting that happens a lot on these forums.

Assuming there was never any update to this?

Been trying to work with the Email renderer locally, using the default schema to supply custom markup that contains mentions. For now, @unknown is always being returned due to the ADF response failing to locate the related mention node id/name.