User blog comment:Kirbyddd/Finally delivered on one of my big promises.../@comment-12360859-20170919092804/@comment-12360859-20170922040613

No problem. That happens to me occasionally, along with other page malfunctions, and I've lost a fair amount of lengthy posts and edits to the thing. The best thing to do is try Ctrl-F5 reloading a couple of times, maybe close and reopen the browser. Logging off and on again might help too. If that doesn't work just wait a bit. I don't know what causes it, I think it's a combination of keeping the page open too long and faulty connection.

A tip that might save you some work in the future:  If your post was in a comment or message box and it disappears after the failed post, you can click reply to start a "new" comment (reopening the text box) and Ctrl-Z to recover the text, then copy it and reload. If you were editing something with either the visual or classic editor you can't recover anything.