I'm having the same problem. I had to replace the screen after a year of use because a dead touch zone appeared as a horizontal bar in the middle of the screen. 3 months after replacing the screen, the bottom 1cm of the new screen is no longer sensitive to touch. OS is Manjaro Phosh but I suspect a hardware issue.
@Uturn Any success getting a free replacement screen from Pine?
@Uturn Any success getting a free replacement screen from Pine?