Inventory Bug

Put the summary of the bug you're having here

What I expected to happen was...:
Describe what you thought should happen here
Debug my Inventory
What actually happened was...:
Describe what happened here
My Inventory was Buggy i must hold left click and can`t use the shift click trick
Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. ...Found the bug
3. ...fix the bug please