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.