id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
13815	Dropdown contents go blank when scroll	Richard		"== Steps to reproduce ==

1. Click on Styles, Fonts, or sizes dropdown in latest demo or nightly demo page.
2. Scroll down the options (either mouse or keys)


== Expected result ==
Expect to see the menu scroll

== Actual result ==
But, the dropdown goes blank.
After about 5 seconds, the menu items reappear

== Other details (browser, OS, CKEditor version, installed plugins) 
Firefox Developer Edition 43.0a2 (2015-10-06)
CKeditor version 4.5.4 on demo page and nightly demo page.
Mac Os X El Capitan 10.11
==
"	Bug	closed	Normal		General		invalid