Yellow bars - MFU warranty replacement, it's a physical screen fault. Noise rendering - I've seen that too. I find that shrinking the map area sometimes gets rid of the artifacts. Only seen it once, it was on a different part of the screen, but have not seen for some time - I occasionally check for it. I earlier stated that I was having spotify issues on 2018.50.6, after a reboot its been stable for a week or so.