Atlassian brought the team "functionality" to JIRA. But it is no news that this functionality, in the way it is implemented by Atlassian, has no added value at all! Atlassian should fix it or remove it, but Atlassian is doing nothing.
Especially because the other functionality "jira groups" is as bad!
To make effective use of "jira groups" you need site admin right which is not logical.
Bottom line: Atlassian speak up what are you going to do? Keeping silent and leaving your customers with two completely useless features? Or fix one the the two quickly? (not "gathering interest for > 10 years, as most of the features on your backlog)