I have a doubt if the green line is coming due to a bug in vivid display mode. Because I got three lines while in vivid mode and after turning to natural mode, fourth line hasn't come yet. Let me know if all of you who had green line issue were using in vivid mode in the comment section below. This will help to identify the bug. Check this post as well
Update: As I wanted to test this, I agained turned vivid mode on, the next day 4th line came. I am now pretty convinced that there is something to do with vivid mode. Anyone who already has green line please try this out so that we get more concrete evidence.
