I apologize if this is not the best way to report a bug, but I don't have any logs and I think just describing it by writing wouldn't do justice.
I came from the Steam Controller and Steam Deck -- where I heavily used the touchpads -- to the Legion Go 2, and installed InputPlumber on CachyOS handheld to be able to play games mapping most of the buttons.
So far so good, but the moment I start inputplumber, the touchpad stops sensing most of the inputs, becoming jittery and stuttery like in the video below:
https://youtu.be/GcrupTcBY6A
(in the video, I have a ssh session to the Legion Go 2, so that I can show what happens when I use the commands)
I can get you any logs or data files you need, but the configuration inputplumber is using there is just the default.