Embed Tag removed from Ephox field

We have an issue where users are inserting tags for you tube videos into the Ephox fields code view.

If the tags are inserted and the content item is saved there isn’t an issue, however, if the user switches back from code to design mode to make further amends - for example center the image - the embed tags are removed from the code.

Rhythmyx version: 6.5.2 Build 200710P01 (3323) [RX-16236]