User blog comment:Kirkburn/Syntax highlighting - helping you read and write code/@comment-24473195-20150311093048/@comment-24473195-20150311165701

I'm not sure if this still qualifies as a bug or not, but I just tested it out and it is actually caused by appending "&debug=true" [1]. It doesn't seem to happen anymore. But the two times it happened when I appended *e.g. ?action=edit or ?action=debug to the address bar, and clicked enter.