When scrolling down on certian websites, particularly search engines, the curser focuses back on the search bar and causes the window to jump back up to the bar.
When scrolling down on a page that has a text entry bar at the top, such as a search engine, the cursor randomly focuses back on to the search bar and causes the page to jump back to the top.
When scrolling down on a page that has a text entry bar at the top, such as a search engine, the cursor randomly focuses back on to the search bar and causes the page to jump back to the top.