Manager Inventory Deletion And Crash

[Tacos4brekky]

Hello,

I recently made a post on the feedthebeast subreddit explaining an issue I had with my 285 command inventory manager having its inventories wiped upon relog. It didn't show an error as far as I saw, but after using a Steve's Addons duplicator (Tell me to go away if this isn't in your domain), interacting with the manager caused my world to unload and put me on the title screen.

I was told to post my crash log to hilburn's github, so I just threw it there. He understandably couldn't figure out why it was crashing, so he referred me to you.

Here's the post in question hilburn/StevesAddons#70

It would be greatly appreciated if you saw this thread, because I would like to know how to avoid this issue in the future.

Thank you,
Kaspar.