Hi,
I have the exact same issue now. Have my Librem 13 v2 for almost a year now and the trackpad started to act jittery very recently (a few days ago).
I found this thread where the same problem was reported, but cleaning the trackpad solved the issue for that user.
For me, cleaning the trackpad did not solve the issue and it is very difficult to find my trackpad usable right now. I need help on this one, as I don’t want an unusable laptop (I always work with the trackpad).