Popup List and Disable Control don't block mouse scroll events

A Popup List Template or enabled Disable element that is placed on top of other control elements will block click and drag events, but not scroll.

I have a popup save dialogue and another case, controls grouped in a Disable group, both contain elements that can be scrolled.
In a few instances they are near scroll-able elements in the lower layer. If you happen to hover the mouse outside the top layer control, it changes the bottom one that should be blocked.