Im in magma server (1.12.2). I got ofuscated and vehicle mod updated to the last version. And I always have the same problem when i'm in server. [IN SOLO works perfectly!]

When I equip the crate of the specific car, it automatically remove his NBT tag. This happends when i try to take a vehicle crate from creative inventory.
If I craft the crate and I open my inventory, the crate's NBT information dissappears. (a nil crate without information in NBT data tag)

What's the problem? Because I have all the mods updated.

I got a video with the problem!

I would have liked to help you but the same thing happens to me but on the CatServer version so we already know that it's not coming from the server version.

Any additional mods? What server software are you using?

Here is the list of mods I use:

And I use the CatServ software mixing plugin and mods.
maybe you want to get the list of plugins too?

Turns out there is nothing I can do. The crates work fine on a normal Forge server. Report to the server software developers that NBT is erased in creative inventory

The same issue happens on Magma https://github.com/magmafoundation/Magma/issues/119

Just wanted to note that the issue was fixed on magma's side.
It should work in the newest version.