Minor Backpack arms are wonky

[phyvo]

I tried to give myself a backpack arm. I click dragged my backpack from my hand to my stump. The backpack disappeared, was still open, and I could access the items inside. I tried to staple it on. Imagine my surprise when the stapler disappeared too and went onto my arm. Once the stapler fell off I ended up stapling a health analyzer onto the stump on top of the backpack. If I had closed the bag I'm not sure there would have been a way for me to access it again. Weird bug.