The bug

The shulker box ui is 2 pixels shorter than the chest ui. It seems that the padding around the "Inventory" label is different.

Steps to Reproduce:

1. Place a Chest
2. Place a Shulker Box
3. Look inside the Chest
4. Look inside the Shulker Box
   → Notice the difference in height

Expected behaviour:

The Shulker Box GUI should have the same spacing as the Chest GUI has.