Pixel C - Physical Keyboard Double Pressing Arrow Keys

I've just last weekend got my Pixel C. So far, I am completely loving the device. After upgrading to Android N, Build 5, the Wi-Fi problems which nearly made me send the thing back are gone. I ordered and received a really cool case by Cooper Cases - the Universal Executive Backlit Bluetooth Keyboard. I have no idea whether this particular keyboard is to blame (though I am thinking not) - but I have reached out to them to ask. The issue that I am experiencing is that the arrow keys (Left, Right, Up, Down) all press twice each time I strike them, making it ridiculously annoying to navigate through text. The only keyboards installed on the device are the default Google Keyboard and Swype. The behavior does not seem to change if I pick one over the other. All other keys work - it is just these 4 keys.

Any ideas?? Is this a known issue with bluetooth keyboards? Is it software related? Anything I can do? It is driving me a bit nuts.

Thanks!

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