[MCM-735] Entities with minecraft:fall_damage component can't be hit.

Partner Rank: 1
Verification builds: 1.13.0.2_beta_rc0

Summary: Entities with the minecraft:fall_damage component can't be hit. This is very game-breaking in maps like "Castles 'n Monsters!" or any map that involves killing entities.

Impact: Entities with minecraft:fall_damage component can't be hit.

Repro Steps:

Create a world and edit an entity's behavior file and add the minecraft:fall_damage component.
Open the world and try hitting that entity.

Observed Results: Entity can't be hit and doesn't take any damage.

Expected Results: Entity should get hit and take damage.

Screenshots/Videos attached: https://imgur.com/a/vy6yEHp GIF from Castles 'n Monsters! (too large to upload here) The viking is a custom added entity, and the zombie dwarf is a vanilla husk.