Size command is unusable, not enjoyable

When size command is used, for example you change your heigh to 1 block, you can enter 1 block height hole, but your character will automatically lay down. Another problem is that whenever height you are, your vision is placed on height of 2 block (normal vision height). This makes this command unusable on bedrock version of the game. on Java version is everything ok but here, players can't enjoy it.