select element hover style inconsistent while native popup is open

On Windows, a select:hover style is lost while the dropdown is open and never restored when the mouse re-enters the popup.

Repro (Windows)

1. Open the repro page and hover the select: it turns blue.
2. Open the dropdown and hover option "Two": stays blue.
3. Move the mouse to the right, out of the open select: turns white.
4. Move back left over option "Two": stays white (bug). Expected: blue.

Actual vs expected

Actual (unpatched)

Expected (patched)

Step 1 - hovered

Step 2 - popup open

Links