I attempted to live-boot an Ubuntu installation to fix it, but the issue with the keys (n,s,h,8, and occasionally others) was still occurring in Linux. I have never spilt anything on my Surface Laptop 3 so I have no idea what is causing this problem. It is definitely hardware related. Interesting that it seems to affect the same keys across so many different models.This is a strange phenomenon. Hopefully, somebody can figure out the bug now that a hint is that the TAB key can be used to remedy. Good news is that software is indicated, not hardware.