I get this this on my S Pro 3 and it's a nuisance, making the device unusable on occasions. I've never got to the bottom of it, but try this to see if it stops the problem:
Device Manager > Human Interface Devices > HID-Compliant touch screen, right-click and select "Disable Device" (you can re-enable it later, of course).
This disables the touch screen for finger input, though you can still use the pen. Does the jumping stop?
I usually leave the device disabled, but sometimes it works fine if enabled, but inevitably the erratic jumping cursor comes back. No amount of recalibration etc. has fixed it. It doesn't seem to be related to to keyboard. Some people have suggested it's due to magnetic interference, and moving the device location cures it, but I've not found that to be the case.
Let me know how you get on.