Using a backpack

Steps to Reproduce

No steps to reproduce

Explanation

Hello! 🎁
I don't know if this can be classified as a bug, but I'll write it anyway.
I bought a backpack when I was playing EFP. It increased my inventory space by exactly one slot.
Then I decided to buy the backpack again and use it, since there were no signs that this could not be done. I just lost my coins after I bought and used this backpack. A new slot wasn't added, as there are probably only 5 at most.
I'm writing here because this is most likely a bug, and perhaps you meant a system in which you can't use this item a second time, but in the game it doesn't work as it should.

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