Sometimes, when after I use my elytra, I seem to be getting an error where my hitbox changes to only be 1x1x1 blocks. This allows me to walk inside of a block in the air. I do not have the crawling/swimming animation. In order to fix, I just use my elytra again. Removing the elytra does not fix. I didn't find this bug anywhere else, but I apologize if it is.