Scroll bug

Yesterday i was looking threw utopian.io when i got a strange bug. How i replicate it.

1. Go to the search field and select a random category (in my example video it is graphics)
2. Don't fill in a specific name and just press enter while leaving it blank.
3. Start scrolling without clicking anything else
4. After a few seconds (3 in my video) the page start scrolling by itself and removing everything on the screen.

No idee why it happens or what may cause this. I only tryed replicating it in google chrome. With 3 extensions enabled. Add Block, Ghostery, internet download manager.

Any additional info needed, please ask and i shall provide!