Hidden Capes reappear when going though a Portal

1.) Hide your cape using Options -> Multiplayer Settings -> Show Cape: OFF
2.) Go though a Portal.
3.) Enter third person mode with F5: Cape is back!
4.) Toggling cape On and back Off will make it go away until you use a portal again.

Seen using 2013 cape, not sure if others do it.

Attached picture of visible cape while setting is off.