Nautilus can make player clip though blocks

If you want to reproduce in survival with cheats, please

/effect give @p minecraft:saturation infinite 0 true

or

/effect give @p minecraft:regeneration infinite 0 true

To prevent dying

Steps to reproduce

1. Tame a nautilus

2. Jump on it

3. Try to make player touch to blocks but don’t make nautilus touch blocks (recommend using ice and clip under them)

4. You take damage

5. Now you’ve clipped through blocks!

Expected: Players can’t go through blocks

Notes: While it not critical, if using Anti-hunger then it might so fricking OP