This is my first mechanical keyboard and I'm absolutely in love with it. The only problem I have is that the left shift key doesn't seem to "bottom out" completely, as if something is blocking it on the bottom, and it doesn't have the "clack" like every other key. There's some weird resistance, it seems muddy or stiff like a rubber dome keyboard. Could this be a manufacturing defect, a stabilizer that needs lubing, or intended? The right shift key doesn't seem to have this problem. Thanks for your assistance.