disappearing pickaxe


**I am currently running**
- Modpack Name: Skylegends 2
- Java version: 1.12.2
- Operating System: Windows 10 (amd64) version 10.0

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**

I keep putting tinkers' constructs uru pickaxes in mechanical users and they keep disappearing after a while. When i have a uru cleaver in it its fine but not a pickaxe
what i do it put the pickaxe in the mechanical user and set it to 'use item on block' , 'left click' , 'upper left slot only' so it breaks the block but when i come back to it sometimes the pickaxe just disappears and i have to make a new one.

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!


Staff member
Hello Chudtopia, would it be possible for you to replicate this for us at a later date?