uru tools dissapearing


**I am currently running**
- Modpack Name: sl2
- Java version: 1.12.2
- Operating System: windows 10

Please include as much information as possible. For the description, assume we have no idea how
mods work, be as detailed as possible and include a step by step reproduction.
**Issue Description**

when you have an uru item and you dont have enough karma it will say its too heavy and disappears when it should just go on the ground and you can pick it up. This can happen when either you craft an uru item or someone else drops their uru item and you pick it up

it caused someone to lose 2 uru items because they were trying to show it to me and it disappeared

Please provide a *full* log (and crash-report if applicable).
Go to https://pastebin.com/ and upload them there, then paste the resulting link here!