Can a diagram missing from Confluence be recovered?

I had a diagram saved in a confluence page. It has mysteriously disappeared. It was never exported, but was saved within and confluence. Can it be found or recovered? Is there a way to see all existing diagrams?

Is this for Confluence Server or Confluence Cloud?

This is in Confluence Cloud. I’ve since recreated the diagram, so I suppose it’s not a concern now.

It would seem Atlassian have a problem that might be to blame in this case. There is a ticket in their JIRA, I would encourage you to vote on it.