CKEditor BR tag issie

Issue with CKEditor 4.x where multiple BR tags pasted into source field get replaced with NBSPs, after toggling from source to wysiwyg and back.

by jpj109

HTML

<script src="http://nightly.ckeditor.com/13-03-21-20-18/standard/ckeditor.js"></script>
<p>http://nightly.ckeditor.com/13-03-21-20-18/standard/ckeditor.js</p>

<textarea id="test">
    
    <br /> 
    <br /> 
    <p>This is a paragraph of text.</p> 
    <br /> 
    <br /> 
    <p>Second paragraph of text.</p>
    
</textarea>

JavaScript

var options = {
    fillEmptyBlocks: false,
	autoParagraph: false,
    height: 200,
    enterMode: CKEDITOR.ENTER_BR,
	shiftEnterMode: CKEDITOR.ENTER_P,
	resize_enabled: false
};

CKEDITOR.replace('test', options);