Double cape invisible elytra

Hello I have discovered a glitch where you can get an invisible elytra.

How to recreate:
(step one) equip a cape skin (e.g.) minecon 2013 cape steve
(Step two) equip a character creator cape (e.g.) founders cape
(Step three) equip elytra (may take a few seconds)
And blamo you got an invisible elytra
I had to edit my videos to meet the size parameters so there are 6 instead of 4.