A multi-channel guest user in Slack reports that, as of Wednesday, September 25th,
"anytime I reference a Jira ticket (in a channel for which the Jira Cloud app is configured), instead of the addon showing an issue preview it returns the following message:"
Jira Cloud APP [x:xx AM]
To show a preview of this issue please log in to the Jira for Slack app. By logging in, you'll be able to create Jira issues from Slack, set up notifications for your Jira projects into channels, and quickly take action on notifications.
Also displayed is a "login" button - when clicked it goes to a "You're not authorized to install Jira Cloud on [Company's Jira Cloud installation].
This behavior is new. The user was able to successfully submit and view Jira Cloud issue details on Tuesday, September 24th.