So, this issue is similar to MCPE-32366, however this is another issue where I am able to essentially have my character hitbox be as if I am still using the elytra (see video attached). I was also able to take off the elytra and the problem persisted until I went in water. The way I made this happen was randomly jumping and rapidly pressing spacebar. I am unsure of the exact requirements but I think either those beds or slabs could be used to reproduce. Also I was playing on a realm if that helps.
Cleaning up old tickets: This ticket has not been updated recently (~1 year+) 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.
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