Wind burst enchantment moves players blocking with a shield when they are not the attacked entity

When a player uses the wind burst enchantment against another player that is blocking, they will not be moved. If the player that is blocking is not the attacked entity, they will be moved.

Steps to Reproduce:

1. Log two players/accounts into a server
2. Player 1 start blocking

   /give @p minecraft:shield[minecraft:unbreakable={value:true}]
   

3. (If reproducing with one person and two accounts) Either pause the game, or press F3 + T and tab out of the game window to continue blocking
4. Player 2 get an enchanted mace

   /give @p mace[minecraft:enchantments={levels:{wind_burst:3}}]
   

5. Player 2 attack player 1 with mace
   → Player 1 is not moved
6. Player 2 spawn an entity next to player 1 (Recommended is shulker, as they don't walk)
7. Use the mace on the spawned entity
   → Player 1 is moved

Screenshots/Videos:

MaceWindBurstShield.mp4

Notes:

Related to MC-269980 MC-269953 MC-270158 MC-269601