Describe the bug
I've had a server for 10 days, everything was just fine, but starting tomorrow, my players discovered a "bug". When you pick up a backpack and move it to a slot, it resets everything, only the materials remain the same. I've tried this in singleplayer mode and it doesn't happen there.

To Reproduce
Steps to reproduce the behavior:

1. Click on the Backpack item in the inventory.
2. Move it to another slot (sometimes it needs more than one try to happen, sometimes it happens on the first swap).
3. See the error.

Expected behavior
The backpack should remain the same.

Versions
Sophisticated Backpacks 3.18.40.777
Forge 1.18.2 40.2.4
Sophisticated Core 0.5.37.202

Video
https://youtu.be/vFuOExknIQo

Note
I'm using a hybrid version of Forge/Bukkit, Magma. But I don't think that could be the problem, since we've been playing for 10 straight days and this issue hasn't occurred before.

Is there a way to reset everything from Sophisticated Backpacks? Like, literally everything, without resetting the world?

Something is resetting the backpacks nbt that's the cause of this issue for you, the only thing I can suggest is try narrowing it down to what combination of mods or perhaps the server itself is causing this and let me know. Very likely will be for them resolve, but I would like to understand what can be causing this as well as it may come up again

and yeah this is Magma issue - see this https://git.magmafoundation.org/magmafoundation/Magma/-/issues/600