Thank you for providing us an update. This behavior may be related to the pen issues that emerged from installing the recent Microsoft updates. To check this further, what exact version and OS build of Windows are you currently running on the Surface? You can get the information by opening Settings > System > About. Can you also check if the March 22, 2018 (KB4089848) or the April 10 security update (KB4093112) has been installed? To view your update history, follow these steps:
- In Settings, go to Update & Security.
- In the Windows Update screen, open View installed update history.
If you have WIndows 10 version 1709, I suggest you perform the suggested steps on this post to resolve the pen issue. The troubleshooting will apply the necessary registry modification on your Surface so the pen can function properly with the latest updates from Microsoft.
Come back if you need more help.