Hello ticketbox

I am facing problem when going to edit pages with editor .

when i am going to eidit something its turn to me bottom of the page
and then i edit and updated this item .

for next item i have to again scroll over .

and when i edit next item its again turn to me bottom .

check the video attached https://www.youtube.com/watch?v=wdrk_JzpKtQ&feature=youtu.be