[MCPE-158059] Natural Sculk Shriekers Do not Activate in Flat Worlds

If you were to get a sculk shrieker with the block state of: ‛can_summon="true"‛ in a flat world that block won't shriek when you try to activate it, thus it won't summon a warden, unlike in a normal world.

You can reproduce this bug without using an external programs making it Mojang's issue to fix and not mine.

This bug affects map makers and skyblock/flatworld players

How to Reproduce in Vanilla:

Create a normal creative world
Type the command: /give @s structure_block
Find a deep dark biome and locate a skulk shrieker
Place the structure block near the shrieker and make sure it's inside the bounding box
Give the structure a name and click Export
Put the .mcstructure inside a behavior pack in the "structures" folder
Install that behavior pack on a flat world and join it
Loud the structure by its name using /structure command or a structure block
Step on the sculk shrieker or give it a signal by a sculk sensor

How to reproduce with external programs

Install Amulet
Create a flat world and place a sculk shrieker
Open the same world and with Amulet
Select the 3D Editor menu
Select the sculk shrieker with the left mouse button
Click Operation in the bottom of screen and select Replace
Select sculk_shrieker and change the propriety value of "can_summon" to "1b"
Click Run Operation and save changes
Go back to Minecraft and step on the sculk shrieker or give it a signal by a sculk sensor

The expected result:

The sculk shrieker shrieks

The observed result:

** Nothing would happen

Please do your best to fix this issue and other issues related to flat worlds like ~~MCPE-147078~~

Thanks for always listening.