Board Thread:Support Requests - Getting Technical/@comment-2213488-20130912184818/@comment-11733175-20130915100304

Oh, the quirks of monobook. It's because monobook is technically loading another page for previewing an edit. It uses ?action=submit rather than ?action=edit in the url.

I have to be honest, I don't know if it's possible to differentiate between going to a preview and moving away from the page. I had a look and there is no way to see where you're going.