Chests in other direction can be placed against chests and are not transferring to a double chest.
(Sorry for bad english)
Also I think there are other issues with chests placement.
Double chests are buggy, this is a known issue.
yes all items are despawning from double chest
I have the same issue
Any fix on this yet?
This was annoying me on my server. So I had a go at fixing it. Please test, check, test.
Implemented double chest fix, closes #2744, fixes #2493