Wooden shelves messing up the sprite placement

[MonkestationIssueBot]

Reporting client info: Client Information:
BYOND:515.1636
Key:absolutelyfooled

Round ID:

5522

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Reproduction:

So when I drag my sprite onto a wooden shelf for some reason it moves my sprite either up or down depending on which shelf I dragged it on. It doesnt go back to normal if you move either.