Cut/Copy/Paste menu disabled after text is cut from WYSIWYG editor

[Krzysztof Studnik]

Steps as in attached video Open CK in IE
Select all text and right click on selection, from menu select "cut",
On empty space right click, select paste. Text is pasted

Retry above operations. Second time, options in menu are disabled, the cursor jumps to upper left corner.

When View source is selected, part of paragraf is left in the editor:

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