The La La Land Blu-Ray rips with no problems, but during viewing the color balance changes slightly, cycling through about 4 subtle variations before repeating. Close inspection shows what looks like faint horizontal bands of color behind the image, almost like a TV ghost from the old broadcast days. This only happens on La La Land, no other rips. It's most visible in darker sequences, like the dance sequence at 31 minutes in. Seems to become more visible from there on. Anybody got any ideas?