Lines form while moving canvas
Every time I move the canvas down using the hand tool or scrolling up, these weird horizontal lines of color like 1 pixel high drop like some delay previewing or something. It's not easy to explain.
I don't experience this in any other Adobe program.
Tiago Palma shared this idea
Tiago, this can be caused by GPU.
Try to update your video card driver and/or disable GPU preview to see if it’s related.