in IE, incorrect enter key behavior with block element in a list item

[alissa]

steps for recreation:

1. type in some text (E.g. 3 paragraphs with few letters)
2. select all format as some header (E.g Heading 1)
3. select all and format as list
4. place the cursor in the middle of the first list item
5. press enter twice

(you already have a weird gap between lines 2 and 3)

6. press up arrow twice (cursor is in the gap but when you start typing it jumps to point 2 and types text has no formatting )
7. write something
8. go 1 down and write something (cursor is in the gap and when you start typing text has header formatting )

-> you got

<ol>
	<li>
	<h1>as</h1>
	</li>
	<li>sdf
	<h1>sdf</h1>
	</li>
	<li>
	<h1>df</h1>
	</li>
</ol>

there is some text that is inside the li but outside the h1.

(i saw a similar ticket but for ck3 #4927)

[Jakub Ś]

This particular TC can be reproduced from CKEditor 3.3.2 in IE8-10 (IE7 works as expected).

It can be reproduced in CKe 3.x and 4.x