Checked xorg log with debug level 12. It has a lot of information that
repeats constantly. And it is only one short move
The only interesting info I could understand were this lines that logged only once at the beginning of the movement:
Can you look at your log with debugging to compare this options?
[ 1714.967] (II) Wacom ISDv4 E6 Finger touch (6:wcmSendButtons): buttons=1
[ 1714.967] (II) Wacom ISDv4 E6 Finger touch (4:sendAButton): TPCButton(on) button=0 state=1
I've compared this log to one I got from the debugging stylus movement without pressing the tip.
(II) Wacom ISDv4 E6 Pen stylus (6:wcmSendEvents): abs prox=1 x=18265 y=11308 z=0 v3=0 v4=0 v5=-900 v6=0 id=0 serial=1 button=false buttons=0
So when using touchscreen it sends from the start "button=true" variable and no matter what.
(II) Wacom ISDv4 E6 Finger touch (6:wcmSendEvents): abs prox=1 x=1588 y=1049 z=0 v3=0 v4=0 v5=0 v6=0 id=3 serial=1 button=true buttons=1