Macbook Pro 15 inch with touch bar have screen distortion when loading user account.
Every time when I turn on my macbook pro and sign in into my account, the screen on the bottom region will distort like the image above for a second and then return to normal. The distortion is different each time but stays in the bottom region.This has always happen since I got the macbook pro. Is this a hardware or system problem?
MacBook Pro (15-inch, Late 2016), macOS Sierra (10.12.1)