I am having the same problem after installing new battery and new screen cause i broke it when pulling it. I transferred the digitizer. I tested everything and it worked fine. Then when it got back up the touch screen is faulty. Works one min, not the next. Sometimes it doesn't work in certain spots. I checked the cables a whole bunch of times too. everything was seated correctly. My keyboard type cover doesn't work right if the touch screen IS working and then if I go in device manager and disable the Intel touch Precise control driver all of a sudden the keyboard type cover works fine and the computer operates as normal without touch functions.
I have seen a few comments mention a ground. I put everything back as I saw it when I took it apart, as well as by following the 3 or 4 videos I found on YouTube. Can anyone give me some detailed information on this ground connection because at this point I wiped my surface out from Windows 11 and I am back on Windows 10. I have a new screen and digitizer on the way again and this is maddening.