If I @ mention someone, I don't just see their username, like I used to. I now see ~accountid:<some large number> while editing
For example,
When I type @Ianbebian and hit enter, I used to see
[Ian McLoughlin]
But now I see:
[Ian McLoughlin|~accountid:5c9147d71b780c2c5d7c0898]
When I save the comment, I just see "Ian Mcloughlin" in blue so the issue only shows up while editing.
I'm on Jira Cloud.