Lava/water does not render under shulker boxes

Lava and water are not rendered when under a shulker box.

Steps to Reproduce:

1. Place lava/water
2. Place a shulker box above the lava/water

Screenshot:

Original Description:
when the water source block or running water block under the shulker box, you can't see the water if you look at the water with the shulker box in the mapping gap of the water or other incomplete blocks next to the water.