In Jira Software I have one single user who, when they try to "@" another user in the comments for a story, does not see a list of other users pop up as they start typing in a name after the @ symbol. Literally one single user. I've logged in as other users with the exact same permissions as her (as well as a few others with different permissions just to see what happens) and a list of other users pops up with every single one of them. I'm stumped, any ideas why this would occur with only one user? Thanks!