I've got an odd one that I haven't been able to figure out. We currently serve users in China and the US and there are a few users that cannot be @mentioned in any project. Permissions are correct in terms of "Browse Users" and project/issue access.
These users can be mentioned via markdown (e.g. [~user.name] ), but no matter how we try, we can't use @. This appears to be because their names are short and duplicated (Yan Yan and Liu Liu)
Is this a known issue? Is there anything I can to make them @mentionable?
Edit - These same users are @mentionable in Confluence, but there appears to be no way to get them in Jira.
Best-
Matt