Resurrecting something from the dead here but I’m seeing issues with a P9 myself. Touch is working but occasionaly unresponsive to swipes (especially left-to-right) or misinterprets swipes as touches.
Googling leads me to believe there’s a grounding problem or something. Or perhaps the part is just bad. I’ll try insulating the screen from the frame and clean the pressure contacts to see if it helps and update this with any new info.