A lot of bugs with cape have been reported since MC 1.8. Cape Floating when you sneak, when you sprint... Shadow bug. Example, try to take an arrow on your character and your cape will have some shadow bugs.
Shadow bug:
https://mega.nz/#!M7BS2SgT!8c5mrMbkfaM1C2TK6GytPYi1xw2gXCx49HHuPaF7Ztc
Fly/sprint animation bug and cape floating when sneak:
https://mega.nz/#!VqQiGSpb!k1gmPrMp5-ua671ttsIdDRAUfZHQCkNXbuoj41tbNi0
My opinion is that bug will be not corrected like other bugs with the capes.
A lot of bugs with cape have been reported since MC 1.8. Cape Floating when you sneak, when you sprint... Shadow bug. Example, try to take an arrow on your character and your cape will have some shadow bugs.
Shadow bug:
https://mega.nz/#!M7BS2SgT!8c5mrMbkfaM1C2TK6GytPYi1xw2gXCx49HHuPaF7Ztc
Fly/sprint animation bug and cape floating when sneak:
https://mega.nz/#!VqQiGSpb!k1gmPrMp5-ua671ttsIdDRAUfZHQCkNXbuoj41tbNi0
My opinion is that bug will be not corrected like other bugs with the capes.