Powder snow does not render through slime mob

Steps to Reproduce:

1. Create a small wall out of powder snow
2. Spawn a slime in front of the wall

Observed Results:
Powder snow does not render through the slime.

Expected Results:
Powder snow should render through the slime.

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Original Description:
When there is a slime in the snow powder block, you can see it in x-ray.

In the image I sent, you can see a river of lava inside the cave, through the slime on the powder snow block