When players other than me(the host) join my world they always spawn at the highest point of the spawn where a block has been placed. The problem with this is if for example you made an arena on creative and swapped it to survival, the players would spawn on top of the arena spoiling the whole idea. Another example is if they left the game in their building and joined again at night, they would spawn on top of their building and be attacked by the mobs. Thank you and I hope you can fix this bug.