I had the same issue, and iI tried to replacedreplace the screen and digitizer and it didn't work at all (spend money for nothing).
After a few weeks i, I was trying again. I touched the flex of the digitizer and it got crazy, like your picture. Then iI tried to took off the board which is connectconnected to this... when iWhen I put it again, the screen was fixfixed. ItIt's been OK for many days now.
So check the board and screw it property. IsIt is a little board where is the MiniSD card reader and the reset button, also has 2 flex, one of the digitizer and the other is grey and connectconnected to the main board.