I can't pick up items I have to drag them.

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I can't pick up items I have to drag them. I can't right click stuff in my inventory or right click my srmor on while I'm in my inventory either. I have to right click whole out of my inventory also if i drag it on it will disappear and when I exit my inventory it will drop it same goes for when I drag something to my inventory from a chest.
What I expected to happen was...:
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What actually happened was...:
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Steps to Reproduce:
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