Entity models in the inventory can render outside the boundaries of the black box

The Bug:

Entity models in the inventory can render outside the boundaries of the black box.

This issue can most commonly be seen with the models of players inside their inventories but also occurs with non-player entity models as well, such as horses, when their inventories are accessed. As a result of this problem, the said entity model can render into the inventory and behind inventory items.

Steps to Reproduce:

1. Obtain elytra and begin flying.
2. Open your inventory, move your mouse cursor around, and look at your player model.
3. Take note as to whether or not entity models in the inventory can render outside the boundaries of the black box.

Observed Behavior:

Entity models in the inventory can render outside the boundaries of the black box.

Expected Behavior:

Entity models in the inventory would not be able to render outside the boundaries of the black box.