With Windows system, If you see the crease or straight-line segment when drawing in Clip Studio Paint by wireless connection the Xencelabs tablet , similar as below:
Please select [Windows Ink] in the Xencelabs Driver, and open the [Preferences] tab of Clip Studio Paint, then select [Prefer quality] in the Tablet Settings option.
To do that, follow the detailed instructions below.
 Open Xencelabs Driver, then click on [Pen Tablet].
 Select [Windows Ink].
 Open Clip Studio Paint, then click on [File].
 Scrolling down to [Preferences] and select it.
 Select [Tablet]. This will open the settings for tablet.
 Set [Using tablet service] to [Tablet PC].
 Set [Tablet Settings] to [Prefer quality].
 Click [OK] button, and test, the issues with a crease or straight-line segment when drawing should have disappeared.