Generic (incorrect) subtitle when zombie attacks iron door

The bug

When a zombie attacks an iron door (sound event entity.zombie.attack_iron_door) the subtitle says "Block broken". This is incorrect because the zombie does not break the iron door, it does not even damage it.

Note: Currently this sound even will never be played due to MC-218122.

How to reproduce

/playsound minecraft:entity.zombie.attack_iron_door master @s

The subtitle says "Block broken"