The reason for this is because the player is usually immune to negative effects of blocks when in Creative Mode (try touching a Wither Rose in Creative. It doesn't give Wither effect), but this is not currently the case for the Ultra Space hazards.
The reason for this is because the player is usually immune to negative effects of blocks when in Creative Mode (try touching a Wither Rose in Creative. It doesn't give Wither effect), but this is not currently the case for the Ultra Space hazards.