[1.18.2] [SOLVED] NBT Data on Items being lost upon dropping

[Brainterminator]

Hey guys I made an Item that can store an Ore Location as NBT Data.

     

The Problem is now that when I drop the Item or move it inside of my Inventory the NBT Data is lost.
Also for some reason when I open a chest or an anvil the NBT Data is lost as well.



Now comes the weird part:
When I open my Inventory in Creative Mode for about 2 seconds it permanently saves the NBT Data. Then I can drop it move it in my inventory and open chests.



Does anybody have an Idea what's going on? I'm clearly not understanding how the Inventory is handled and I also understand that dropping an Item must mean it will be somewhat converted into a different entity.
Thanks in regards for your help!

The Github Repository is:
https://github.com/Brainterminator/utilityblocks

Edited June 22, 2022 by Brainterminator
Adding GitHub Repo

[Brainterminator]

3 hours ago, diesieben07 said:

You are setting the NBT data client side. You must set it server side.

Yes that was the problem. One of the involved Items still had a isClientSide check. Removing it made it work. Thanks a lot!

Edited June 22, 2022 by Brainterminator
SOLVED

[Brainterminator]

On 6/22/2022 at 9:15 AM, diesieben07 said:

You need to not remove it, you need to do the check on the server side.

I guess that's what I did. It works totally fine now on Servers and on Single Player