Summary

Sometimes there is an error:

We couldn't connect to that issue
Make sure that this issue actually exists in that project. If it does, try again in a few minutes. If you still can't link to the issue, contact your JIRA admin.

in Detail Issue View

Steps to Reproduce

1. Go on a board that has the Issue Detail View Labs feature
2. Click on an issue to see the details

Expected Results

View the issue details

Actual Results

We couldn't connect to that issue

Workaround

Turn off the Issue Detail View Labs feature in the User Profile