After closing screen, half of touch becomes unresponsive

Hello, i recently bought refurbished Iphone 8 screen. I tested the screen before closing and it was working as it should. But when i closed the screen (attached it to the frame) half of touch stops working until i open the phone up and "shake" with the LCD, then it starts working again, sometimes 2 vertical lines shows up but shaking again makes them disappear. I tried closing the phone slowly, fast but still nothing. Also the original screen works just fine. My guess is the flex is somehow damaged or idk, anyone knows how to reslove this issue?