The Nvidia driver has a screen which allows me to select, for a given executable, whether the NVidia chip or the Intel chip is used to play that game. I've tried setting that to "High Performance NVidia GPU" instead of "Automatic" for each game where I've encountered the issue, and it had no effect; the problem still happened.

However, I haven't tried setting that globally for the system (i.e., setting the global system to Nvidia instead of automatic). That might be worth a try. I'll give that a shot!

I'm not sure how to disable the Optimus feature, but maybe that's the equivalent?