Vanilla cape texture is not mirrored on the underside

The issue

The Vanill Cape's texture is not mirrored on the underside, creating a missmatch of textures along the corner. 

 

How to examine

The underside of the cape is best visible when crouch running with a high amount of speed. 

 

Possible Solution: 

The underside is mirrored, making the corner textures match.