Hi, this might be an odd bug, I would say its a rendering issue.

When you have the new "Pancake Cape" equipped whilst wearing an elytra, it doesn't render the wings on your player in-game.

So basically you look like your flying without any wings, Its a funny little bug.
The superhero bug I'm calling it.

But it needs fixing, that's why I've made this report.

You can see this below.

Thanks,
DRP