[MCPE-190276] minecraft:behavior.delayed_attack's on

The minecraft:behavior.delayed_attack's on_attack property is not working like intended and documented here (https://bedrock.dev/docs/stable/Entities#minecraft%3Abehavior.delayed_attack)

For example:

"minecraft:behavior.delayed_attack": {
        "attack_duration": 1,
        "cooldown_time": 5,
        "attack_once": false,
        "require_complete_path": true,
        "on_attack": "example:delayed_attack"
}

"example:delayed_attack": {
        "queue_command": {
          "target": "self",
          "command": ["summon pig", "say Everybody welcome the pig!"]
        }
}

Does not summon a pig, nor execute in general (Proofed via debugging)

The only thing I receive from Bedrock is the following error

[Json][error]-My World | actor_definitions | C:/Users/MyUser/AppData/Local/Packages/Microsoft.MinecraftUWP_8wekyb3d8bbwe/LocalState/games/com.mojang/development_behavior_packs/example_bp | example:mob | minecraft:entity | components | minecraft:behavior.delayed_attack | on_attack | on_attack | unknown child schema option type.  Allowed types:  ''

minecraft:behavior.delayed_attack's on_attack property not working