We are on a fresh hosted install of Deskpro. The application linking went successfully between Deskpro and Jira, we can create or link a Jira Issue to a ticket. We can't however unlink a linked issue and we can't link multiple issues to the same ticket in Deskpro. Not sure if this is unique to a recent release, we are up to date on version 414. I don't see anything in the error logs for Jira or Deskpro that would relate to this either. We click to add the second issue, it doesn't throw any errors, it just doesn't appear to link it.