The bug
When using /clone to copy chests, they will merge if possible, disrupting the arrangement of the original set of chests.
How to reproduce
Facing west, place two chests to form a double chest
Place another chest to the left of it
Break the right half of the double chest, leaving you with two adjacent single chests
Stand on top of the left chest
Run this command:
/clone ~ ~ ~ ~ ~ ~1 ~ ~1 ~→ ❌ The cloned chests one block above have merged instead of remaining separate
I personally wouldn’t consider this a bug. The chest only become a double chest when they are next to each other in the source location.
When you clone the chests from 2 different location not next to each other they will not attach until the game is reloaded. This could be considered a bug. Never the less I have to say cloning double chest in one way or another is extremely buggy.
i have had trouble with them crashing like explained in MCPE-98511
Tho someone said it’s fixed in one of the latest betas.