The Bug:

Parrots mounted on players' shoulders can die when using the riptide enchantment. Can be done by facing directly down and using Riptide.

Steps to Reproduce:

• Summon and tame a parrot.
• Set the weather to "rain" and obtain a trident enchanted with riptide.

  /give @s minecraft:trident{Enchantments:[{id:"riptide",lvl:3}]}
  

• Approach the parrot so that it mounts your shoulder.
• Look downwards and prepare to throw the trident (hold right-click), without actually throwing it.
• Jump and before you start moving downwards, throw the riptide trident.
• Take note as to whether or not parrots mounted on players' shoulders can die when using the riptide enchantment.

Observed Behavior:

Parrots can still sometimes die.

Expected Behavior:

Parrots would not die.