The bug

Creakings do not have damage immunity in the traditional sense due to being impervious to traditional damage sources. However, it is still possible to make projectiles bounce off of them rather than being absorbed.

How to reproduce

1. Spawn a creaking_transient
2. Get a skeleton to shoot at it
3. Just before the arrow hits it, punch it

Expected results

The arrow would be harmlessly absorbed by the creaking.

Actual results

It bounces off, as though the creaking had temporary damage immunity.