Hi Asdfplaya,
Thanks for reaching Microsoft Surface Community. We thank you for taking advantage on our new Surface Pro 7. Totally, this is not the experience that we want you to have. We do have some questions that will help us narrow down your concern.
Does this issue occur when you plugged in your charger?
This could be more on the DPST or Intel Display Power Saving Technology. You may check this link below. Under the link, please don't mind the Windows version of it. This is also applies to Windows 10 OS.
Looking forward on our response. Please keep us posted.
Regards,
Edd