[bug] Placing shulker box via dispenser is throwing an error

[phaldan]

Are you using the latest available version for your server?

• I am using the latest available version of fuji for my minecraft server.

Is there an existing issue for this?

• I have searched the existing issues.

Current Behavior

Activating dispenser is showing a smoke animation, but shulker box is still in dispenser and has not been placed. In the server logs a NullPointerException is thrown in AntiBuildInitializer (player variable contains null). More details can be found in the server logs.

Expected Behavior

With activating dispenser the shulker box gets removed from the internal storage of the dispenser and placed in front of the dispenser. No error is thrown.

Steps To Reproduce

1. Place dispenser with a button attached
2. Put a shulker box into the dispenser
3. Trigger the button
4. No shulker box appears in front of dispenser

Server Logs

https://mclo.gs/Hj7TZxv

Anything else?

Minecraft Server: 1.21.1
Fabric Loader: 0.16.9
Antibuild config:

{
  "anti": {
    "break_block": {
      "id": [
        "*"
      ]
    },
    "place_block": {
      "id": [
        "*"
      ]
    },
    "interact_item": {
      "id": [
        "*"
      ]
    },
    "interact_block": {
      "id": [
        "*"
      ]
    },
    "interact_entity": {
      "id": [
        "*"
      ]
    }
  }
}