Shields don't lose durability when blocking bees' attacks on easy or normal difficulty

The Bug:

Shields don't lose durability when blocking bees' attacks on easy or normal difficulty.

This behavior is very likely intentional judging by the resolution of MC-137588.

Steps to Reproduce:

1. Set the difficulty to "easy" or "normal".
2. Obtain a shield, summon a bee and attack it.
3. Block the bee's attack with your shield.
4. Take note as to whether or not shields lose durability when blocking bees' attacks on easy or normal difficulty.

Observed Behavior:

Shields don't lose durability.

Expected Behavior:

Shields would lose durability.