Warden's ranged attack is no longer affected by the game's difficulty

In the latest snapshot (22w17a) the warden's ranged attack always deals 10 damage, no matter the difficulty, this is different than the last snapshot.

How to reproduce: 

1. Switch the difficulty to easy.

2. Summon a warden, make it angry to yourself and pillar up 5 blocks so it can't reach you.

3. Wait 5 seconds for the warden to attack you with its ranged attack.

4. Repeat the above steps for the normal and hard difficulties.