Killing a player's mounted nautilus will cause that player to briefly glide upward, unaffected by gravity

How to reproduce:

1. Summon and tame a nautilus on land.

2. Equip it with a saddle and ride it.

3. Have another player kill the nautilus, or execute the following command:

   /damage @n[type=minecraft:nautilus] 100 minecraft:player_attack by @s