Okay, I noticed the cursor stall/freeze problem disappeared maybe a week ago on my Surface Pro 7. I'm not getting excited yet because the problem might recur.
I didn't do anything different. Maybe there was a Windows Update (automatic); can't remember. Anyway, the problem is gone for now.
I've had this SP7 the day it was released and the problem began right out of the box before any additional software was loaded. I've followed all MS fix instructions to no avail. I did not do anything other people suggested in these forums. All of the hullabaloo in the forums was pointless for mine. My SP7 problem even occurred in tablet mode with nothing attached including the charger and type cover.
Thankful for now. Has anyone else noticed the problem fixed?