Try updating the graphics drivers manually .. it seems like that fixed it on my Surface 8, finally. https://www.intel.com/content/www/us/en/download/785597/intel-arc-iris-xe-graphics-windows.html
These gfx drivers (Intel Xe on my system) apparently arn't always pushed to latest Intel version via windows update b/c it appears the surface team does QA on them before pushing them out.. (this is a good thing generally.. )
but it seems like as a result of that process things that fix bugs like this sometimes lag a little. Hopefully this works for others.
Thank you so much Adam for this solution! It seems to have worked for me too!