Oh I can see your problem. There's a solution here ;)

Working just fine for me. Are you sure that you don't have any toolbars or add-ons that create frames, or your network is not injecting HTML?

Lately this has been happening to me as well ... using Edge.  Sometimes hitting the back button several times will work, and often the page will suddenly 'jump' below the fold.

This jumping also happens sometimes when changing to another Forum topic.

As you say, only on GZ.

UPDATE:  After updating to Win10 Anniversary Edition, Edge browser has now been rock-solid fine when accessing and moving around Geekzone