I have the same problem with my x80 plus, it drives me crazy. I wasn’t expecting much out of $100 tablet, but a bad touch panel or misconfigured touch setting is crazy. I went to the Teclast site to download new firmware hoping that there was a fix for this issue, and when I put my model number H5C6 its missing part 3 & 4 of the PAR files.
Any one have a solution? I took the touchsetting.gt file from TechTablets x80 Plus dump which has model of H5C5 but it really throws off the touch input.