I have experienced this issue on basically all of the bedrock editions, It also disables a horse's ability to walk up one block walls when around 8 blocks away from it. It doesn't seem to be a world border that follows the player but multiple clusters of chunks that cannot be accessed. Entities may access them but will then be kept in suspended animation (this doesn't stop them from being able to attack you, the player) if you try mounting an entity that is in one of these chunks you will be booted of the entity and then be stuck jittering in mid-air.
DanteBussey
I have experienced this issue on basically all of the bedrock editions, It also disables a horse's ability to walk up one block walls when around 8 blocks away from it. It doesn't seem to be a world border that follows the player but multiple clusters of chunks that cannot be accessed. Entities may access them but will then be kept in suspended animation (this doesn't stop them from being able to attack you, the player) if you try mounting an entity that is in one of these chunks you will be booted of the entity and then be stuck jittering in mid-air.