probably not a glitch.
when it comes to windows 10 on laptops, you sometimes need to manually specify which GPU to use on which applications in power settings.
This handy little guide with pictures should help.
While it is a guide for OBS, the method applies regardless.
https://obsproject.com/wiki/Laptop-GPU-Selection-Windows-10
Please note that on some systems, instead of it saying "Classic App" it will instead say something else to a similar effect.
So if you don't see "Classic App" as an option, that's because it's just going by a different name.
I doubt it's some kind of visual glitch.
One way to find out for sure is to install MSI Afterburner, and go into it's settings, and to the "monitoring" tab and go through the list and click on the options for GPU usage and such, and when you click on that option to highlight it, look down below and tick the box for "Show in On-Screen Display"
Then you can head over to the "On-Screen Display" tab, and set up a key combo to activate it when in game as an overlay, and use it to see if the Nvidia card is actually being used or not.