The bug
The wearable component enables an item to be equipped as armor, and signals any matching attachables to only render when the item is equipped in the specified slot. The item can be shift-clicked in the inventory to equip it, or used (right-click) in the world.
Non-player armor like wolf armor uses the slot.armor.body slot. Players don’t normally have this slot, so wolf armor can’t be equipped by players. However, custom armor using this slot erroneously can be equipped to an invisible, inaccessible slot by using the item.
How to reproduce
Download and open the attached world
Hold the custom item that looks like an apple
Right-click
Expected behavior
Nothing should happen
Observed behavior
You equip the item into an invisible slot and it starts rendering on your body