UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.81 Safari/537.36

Steps to reproduce the problem:
1. Create an element that has scrolling overflow
2. Create a fixed position element that is a child of the scrolling parent
3. Hover over the fixed position child and try to use mousewheel (or click fixed position and try to use keyboard)

What is the expected behavior?
Expected behaviour is fine, any appetite for the desired behaviour, when hovering over a fixed position element that is a child of a scrollable element to still allow the parent to scroll on mousewheel?

What went wrong?
Again, nothing went wrong, just asking if there's any appetite to change the current behaviour.

It's understandable that you can't scroll when hovering over a fixed position element that is positioned over top of a scrollable element AND the fixed position element IS NOT A CHILD of the scrollable element. But if the fixed positioned element is a child of the scrollable element, and is not scrollable itself, can a mousewheel event cause the parent to scroll?

Did this work before? No 

Chrome version: 58.0.3029.81  Channel: stable
OS Version: OS X 10.12.4
Flash Version: Shockwave Flash 25.0 r0

Example: https://jsfiddle.net/5a6jw4fa/

Hover over the black box and scroll, and then hover over the red square and try and scroll (mousewheel)