Problem HTML5 source video double

Hello!

When I put in the code of ckeditor (in the demo online):

<video><source/></video>
<video><source/></video>

and if I swap in Wisiwig mode, when I return in the source, this result appear:

<video tabindex="0">
   <source></source></video>
<p>
   <source>
   <p>
      <source></source></p>
   <source>
   <p>
      <source>
      <video tabindex="0">
         <source></source></video>
      </source></p>
   <source><source>
   <p>
      &nbsp;</p>
   </source></source></source></source></p>

How can I resole this problem?