He'll make great plays when he doesn't set his feet. But i watched that entire game. He spiked quite a few and missed some easy swing passes for the same reasons. The INT was on 4th down so you may as well force something than take a sack.
The Raiders seemed to spy him too. Keeps his eyes down field but it seemed to make him uncomfortable. He made some great throws while scrambling, but he completed like 50% of passes. He missed some easy ones too.
He also tries to initiate contact as he goes out of bounds to get calls. So if you're going to get the call anyway, may as well let him have it.