Steps to reproduce
Please open the fiddle (https://jsfiddle.net/regweyzh/18/) in mentioned edge version. Click the button to expand the content area. Hover over it to make the scrollbar appear. Then again click the button to shrink the content area. You can see that the scroll bar stays fixed in the position. But on again hovering inside the content area the scroll bar disappears.Please see the attched image.
Comments and activity
Please remove the closing parenthesis from the fiddle url.