Did you have a Gliffy Diagram you saved but now cannot locate in JIRA?
JIRA treats the Gliffy diagrams as attachments, so it must have a saved issue to attach to. Unfortunately, if you did not save and name the issue in JIRA, the Gliffy diagram has no where to attach to. This is unfortunately a limitation of how JIRA treats the Gliffy Diagrams.
You may be able to search through JIRA for the name of the Gliffy diagram to try to retrieve it, but if it does not come up it was likely lost unfortunately.
We would always recommend creating and naming the issue in JIRA first, so if there is a browser or connection issue and you need to quit, a draft would still be attached to the JIRA ticket.