[Molang][error]-Error: unhandled request for unknown variable 'variable.worldz'

Summary:
Content logs displaying errors appear on the screen when loading the world.
[Molang][error]-Error: unhandled request for unknown variable 'variable.worldz'

Impact:
This issue is currently holding up our release titled 'Mutant Mob Pit'. This issue cannot be replicated in our version of Minecraft but was flagged by Content Review. It is the only notice we received back from Content Review.

Repro Steps:
From notice by CR, steps to repo:
1. Launch 'Mutant Mob Pit' world from template.
2. Wait while the world is being generated.

Observed Results:
Content logs displaying errors appear on the screen when loading the world.

Expected Results:
Title is free from any visible content log messages.

Notes:
Here is a video demo by Content Review showing this issue
https://drive.google.com/file/d/1pKZ0spGOsCXQgzKCCp2BsBbqCtv0D5iS/view?usp=sharing

Apparently this occurs in Mutant Mob Pit, our submitted content. Talking another partner, it seems this error is caused by world generation and is unrelated to custom content.

We are unaware of how to reproduce this or how to fix this. There is nothing in the behavior pack or resource pack that includes this wording that is listed and not something we have added. This has not affected gameplay.

CR indicates this issue is affected on:
iPhone 4S
iPhone SE
iPhone 6+
iPhone 8 Plus
Nokia 2.1
Nokia 1 Plus
Samsung Galaxy J5
Xiaomi MI Mix 2
Nintendo Switch EDEV
Xbox One X (dev kit)
Playstation 4
Windows 10 PC