Question Left side of Shift key types | and right side types \

Jul 4, 2019
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Recently I took apart my keyboard a tad for no specific reason, and now once I've put it back together it works normally apart from this one completely unknown problem.
I have no idea what could be causing this and it's a real pain to work around.
Any ideas or help is appreciated.
Edit: Does not happen with the right shift, and my keyboard is a duowan dw3000.