I've been playing quizzes, and sometimes I pause half-way (to multitask). But after when I unpause the quiz, there's a dotted line, and a few centimetres of white, on the top of my page (on top of the JetPunk blue menu thing). The dotted line thing was meant to be so that the typing-box travels down when you scroll during a quiz.
It's happened on both Microsoft Edge and Google.
a dotted line is displayed + a white blank area on top of the page.
What I found snooping into the code:
The dotted line => id "mobile-controls-holder" is displayed just like it should be on mobile mode olny.
The white area: class .mobile-scroll-page has padding-top set to 95px, just like on mobile too.