After 10 month of use my Teclast F6 Pro has the problem with touch screen, when I click anywhere on the screen – touch works only on Windows taskbar about only 1 cm from the bottom edge. I calibrate screen in the Windows 10 and click works only on the bottom edge.
Next problem is with the touchpad and keyboard, after about 1 hour from turn on, touchpad and keyboard doesn’t work, after restart all works fine.
I have exactly the same touch screen issue. This problem started one fine day when I tried resuming from a blank screen saver. After that the touch works only at the lower half of screen. Tried reinstalling the Goodix TP drivers but no help. I suspect hardware issue. If anyone solved this, please post in forum.