Just checked with 4 service centers and they have no idea whether its hardware or software issue. By default they would go for screen replacement. The point is how in the world everyone is suffering from same issue.
Samsung Note 9 Display Problems Please Join only if you are facing the Display discoloration or Overheating or horizontal lines on display when the brightness is set to low. All these issues are started recently after software update, not by any accidental or physical damage to display. https://t.me/samsungDisplayProblem