We have a new WebGL Bug as of Unity 5.5.0f3 in Chrome with AMD Radeon Cards - instead of normal shadows we get a large shadow over the player that follows the camera - we’ve narrowed it down to an issue with Chrome and AMD Radeon GPUs - all relevant info: Imgur: The magic of the Internet
It doesn’t seem to be AMD model or driver related as all machines have different cards and driver versions - just seems to be a general case with Chrome 55 and AMD.