I've never seen anything like that. I have the S8 Ultra as well and it writes accurately without drawing lines like that. Do you currently have air actions enabled for the S-Pen in the settings? If so, can you please turn those off and see if that has any impact on the issue? Also, on the second section of the settings popup, make sure that "Enable palm rejection" is turned on. If you open the pen settings dropdown, do you have pressure sensitivity enabled? You can try toggling that as well.
Is there a case on the tablet? If so, please also try taking that off as I'm curious if it's touching the screen in some way. I'm just grasping at straws as everything seems to work perfectly fine on my S8 Ultra with version 3.8.6. If you go to Settings->About, are you also running version 3.8.6?
Mike
Is there a case on the tablet? If so, please also try taking that off as I'm curious if it's touching the screen in some way. I'm just grasping at straws as everything seems to work perfectly fine on my S8 Ultra with version 3.8.6. If you go to Settings->About, are you also running version 3.8.6?
Mike