Minecraft Version

1.18.2

Immersive Engineering Version

1.18.2-8.3.0-155.jar

Expected Behavior

not sure when but I did go into creative mode and then back into survival when I was in a server testing survival experience on some things.

20 min later I opened my tool box expected to see my things

Actual Behavior

contents are voided. This is an issue in cases of survival servers where getting such things back would be next to none when it comes to bugs

this issue appears to have some correlations with a bug in older versions that is still present #2737

My guess is that a simular situation is going on like in this 12.2 bug

Steps to reproduce

confirmed, it seems to be collated to the same creative tab shenanigans in #2737; more so when you use a dense-saved tab like this for saved hotbars; NOT that its stored in there but accessing it.

To reproduce this issue; have a toolbox and/or creates with stuff in your inventory and then entering the saved hotbars tab FOR THE FIRST TIME, using this specific hotbar content save

PLEASE NOTE that most of the items are vanilla with a exception for a few, but this should do the trick
hotbar.zip
put this folder into your instance; this should help reproduce the bug

1. have IE items that can hold an inventory
2. be in creative and enter the Hotbars Tab; its important to be loading this up for the first time; if not then restarting your instance should do the trick}
3. look into and place your storage containers and find their contents being voided

Debug Crash Log

https://pastebin.com/GyzhBahY

Simply put; I believe this from my perspective to be some sort of false positive setting off whatever is preventing any soft lock from rising from exceeding the NBT storage limit

I had the same issue occur on my 120.1 forge server the other day. The contents of every storage crate, all engineer's crafting tables, all toolboxes and all backpacks from Sophisticated Backpacks were all completely wiped out at the same time due to repeated placing and breaking of storage crates. Server had been running for a few months without any issue.
We have since been able to replicate it twice, and it is 100% related to repeated placement and breaking of storage crates.

I found the issue not only in #2737 but also in #2245

It does indeed appear to be related to NBT issues.

Originally running Arclight, but switched for Forge only and replicated the issue.
In addition to also voiding the contents of Sophisticated backpacks, I believe it may have deleted all children in inventories from Minecraft Comes Alive (Reborn) as well, though harder to be sure and haven't been able to replicate that one.