I recreated the red pixels on my GTX 1060 3GB, using a window resolution of 1888x1061 (couldn't set the 1120 height, didn't let me drag it further, but the red pixels were still visible), 4x AA, 8x AF. I saw some strange flicker on the railings on the right as well, while the camera was stable and I didn't move it. I don't know if it's related or helps in any way. Highlighted both on my attached screenshot.