Swapping armor by right clicking deletes the old one

The Bug:

Swapping armor by right clicking with an item deletes the old one you had equipped.

Steps to Reproduce:

1. Equip any armor.
2. Hold any equivilent armor type (that you can swap with the equipped one) in your hand.
3. Use it in survival mode.

Observed Behavior:

The old armor piece you had equipped gets deleted and replaced with the new one.

Expected Behavior:

The old armor piece should swap with the new one.