Closed shulkers have a slightly smaller render radius than open shulkers

The Bug:

Closed shulkers have a slightly smaller render radius than open shulkers.

Steps to Reproduce:

1. Summon a couple of shulkers next to one another.
2. Travel a decent distance away from them.
3. Take note as to whether or not closed shulkers have a slightly smaller render radius than open shulkers.

Observed Behavior:

Closed shulkers have a slightly smaller render radius than open shulkers.

Expected Behavior:

Closed shulkers would not have a slightly smaller render radius than open shulkers. Instead, closed shulkers and open shulkers should have the same render radius.