[MCPE-78030] Minecraft crashes loading purchased world City Life 2

Update on this issue:

Potential Workaround: Some users have found that they are able to allow the world to run correctly if they reduce the render distance in their Video Settings.

Affected devices mentioned:
Kindle Fire 10
iOS
PlayStation 4

Hi, I just bought City Life 2 for my son's Amazon Kindle Fire 10 which he uses in Kids Mode.
He can play MineCraft fine and has been doing so for a year or more. He has multiple worlds, all of which load without issue. He has downloaded several free worlds from the market place, all of which work fine.

Last night I made our first purchase of minecoins as a treat so that he could download a paid for World. He chose City Life 2 and I bought it.

I downloaded it under his profile in MineCraft but the game crashed just as it finished downloading and crashed the whole Amazon Kids environment (back to the kindle black screen with Amazon Kids logo and circling loading thing. After that, Minecraft crashes out on loading.

Rebooted the kindle and minecraft loads ok and all previous worlds load and can be played.

Tried to create a world from the new City Life 2 template, this processed all the way through but then was very jerky and would not play, then crashed..

We're unable to load the new world and trying to create a world from the template crashes constantly returning to the kindle homescreen.

I have tried this outside the kids profile too - I've logged in to the kindle as me, outside the kids profile and the same issue happens. So i don't think that it is something to do with the Kids profile aspect.

Please can you help get this working, particularly as this is our 1st market place purchase it's very disappointing.