Middle Thumb Button Sticking

Hey all, Got a corne 6 column kit but I'm having a small issue I wonder if there is a fix for. The middle thumb button on the left side is not smooth when pressed unless I press it exactly in the middle of the keycap. It is a Kailh chock white switch that I ordered with the kit. I tried turning the cap around and swapping it with another thumb key just in case the cap was causing the switch to act weird.

It's hard to explain what it feels like. When pressing it feels like it's getting caught on a ledge and then snapping past it. Just makes for a fidgety typing experience. Any ideas?

Oh and it also doesn't look like the keycap is hitting the case at all. It's close but definitely not getting caught on the case.
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