fixed positioned element flicker in IE only, how to solve?

Question

Weird problem in IE11, the fixed background of the following project flickers when using mousewheel or cursor keys only. This is a bug, for sure.

website: http://ge

Answer 1

We can remove grey flicker on IE9, IE10, IE11, MEdge<=20 by setting overflow of html and body like

html{
  overflow: hidden;
  height: 100%;    
}

body{
  overflow: auto;
  height: 100%;
}