The bug

Sculk shriekers fully occlude the top face of any block they are placed on top of. However, for some reason, they do not cull that block face, causing it to be rendered for no reason.

This does not happen in Java Edition, making this a parity issue.

How to reproduce

1. Place a sculk shrieker on the ground
2. Enter Spectator mode
3. Fly into it

Expected results

The block below the sculk shrieker would not render its top face, as the sculk shrieker fully covers it.

Actual results

It gets rendered anyway.