UserAgent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.99 Safari/537.36

Steps to reproduce the problem:
1. Load the attached page. The page should scroll and so should the 
<select> halfway down.
2. Click the down arrow to expand the <select>. Don't move the mouse.
3. Roll the scroll wheel.

What is the expected behavior?
The list of options that has just expanded is scrolled.

What went wrong?
The page scrolls, closing the expanded list of options. This behaviour means a careful repositioning of the mouse is needed to use the scroll wheel to scroll after clicking the <select> element.

Did this work before? No 

Chrome version: 67.0.3396.99  Channel: n/a
OS Version: 6.1 (Windows 7, Windows Server 2008 R2)
Flash Version: 

If using the expanded list as the scroll context for the <select> element is really objectionable, it would at least help if the list is not automatically collapsed when the page scrolls. The collapse is often unnecessary since the list fits on screen in its position relative to the <select> element both before and after the scroll.
 

Deleted: chrome_select_scroll.html 6.0 KB

chrome_select_scroll.html 6.0 KB View Download