I'm using Surface Laptop i5. Few days ago updated to Windows 10.0.18362.145 (x64).
I also signed up to Windows insider program, slow ring - so I may have newer driver installed but haven't found yet.
Now, I lost pen support and multi-touch support on the touch screen though touch pad still works.
System info reported by Windows displays [Pen and Touch] = [Single Touch Support].
Afterwards I failed to fix issue by installing updated drivers/firmware for my laptop using SurfaceLaptop_Win10_18362_1901508_0.MSI.
Multiple times I removed HID-compliant touch; rebooted; and waited for Windows to reinstall that driver - all to no avail.
So it looks like misconfig in display driver setup or incorrect touch display driver.
Any ideas on how to get my multi-touch + pen support back?