When you take off with an elytra while facing southeast and holding nothing, this bug happens.
Discovered on 1.13.0
How to reproduce: Wear an elytra, and fly down while facing southeast and holding nothing in your main hand.
I recorded a video on the bug: https://www.youtube.com/watch?v=DgtPhwKiAD4
Comments 2
Cleaning up old tickets: This ticket had been set to 'Awaiting Response', but has not received a response from the reporter (~3 months+) so is being closed as Cannot Reproduce. If you feel this is still a valid issue then please comment, or create a new ticket following the Issue Guidelines which includes steps to reproduce the problem.
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Are you referring to the hand disappearing? If so, this is a duplicate of MCPE-53092.