It may or may not fix the particular issue in this case, but I just had the same thing happen and got it worked out, so posting just in case. I’ve had this issue literally a few moments ago, as well as on the MSI laptop I had for less than a year. Basically all i did was to restart the stupid thing. My keyboard was lit up and typing fine one moment, but then suddenly in the middle of a sentence it wouldn’t register a key stroke on any program I had open. Restarting fixed it. A lot of people are having that issue lately, especially if you’re on Windows 10. So, if you have problems with it, quickest way to try a fix is restarting and seeing if that does it. Not sure why it does to begin with though.. But, yeeeeah, I miss my MSI...