The bedrock cuboid located below summoned end crystals is not included within end crystal hitboxes

The Bug:

The bedrock cuboid located below summoned end crystals is not included within end crystal hitboxes.

Steps to Reproduce:

1. Summon an end crystal in the air by using the command provided below.

   /summon minecraft:end_crystal ~ ~5 ~

2. Enable entity hitboxes by pressing "F3 + B".
3. Look at the bedrock cuboid part of the end crystal.
4. Take note as to whether or not the bedrock cuboid located below summoned end crystals is included within end crystal hitboxes.

Observed Behavior:

The bedrock cuboid isn't included within end crystal hitboxes.

Expected Behavior:

The bedrock cuboid would be included within end crystal hitboxes.