items you /give with command blocks spawn in the slot for your boots

What I expected to happen was...:
if i triggerd a commandblock a diamondsword would spawn in my backpack

What actually happened was...:
it spawned in the slot for my boots i survival and in creative and deleting my boots

Steps to Reproduce:
1. place a commandblock
2. type in /give @p 276
3. trigger it with a button and look in your survival backpack it will be in the slot for your boots