berewin

Thanks! Setting it on Low Precision fixed the issue. High Precision wasn't as bad, but still has issues. 
 
       
 

Hey berewin,
Can you try the beta please:
In the past few months, we have made so many changes to pen input. This beta changes a few things and adds multiple input options from the Preferences > Tools. Have a play with those settings and see which one works for you.

Click here to download the latest beta
Status: Customer Beta
Purpose: Fixes
Requirements: A valid product key (for Affinity Store purchases), or an installation of the full retail version from the Microsoft Store

As this is a beta it is considered to be not suitable for production use. This means that you should not attempt to use it for commercial purposes or for any other activity that may be adversely affected by the application failing, including the total loss of any documents. We hope you enjoy the latest build, and as always, if you've got any problems, please don't hesitate to post a new thread in this forum and we'll get back to you as soon as we can. Thanks once again for your continued feedback. 

If you have a general question about the software, please head over to the Questions Forum, or if you have any suggestions, please head over to the Feature Requests forum.
Fixes
Fixed tablet input problems by reverting the default input method to be Low Precision mode, the same as in 1.8.3.  Added tablet input preference (in Tools section) to opt-in to High Precision mode, or Windows Ink mode (previous command line options --legacy-wintab and --disable-wintab are now ignored). Fixed cursor disappearing following keyboard shortcuts that display dialogs, while using a brush tool Fixed raster Crop Tool units multiplying incorrectly on the context toolbar 1.8.4.693 release notes