Resolution changing on its own

I'm on a notebook that runs on 1920x1080 resolution.

I've started all three games (only up to the menus) and initially all of them automatically ran in my native resolution. Checking Graphic settings, resolution was properly set to 1920x1080, so everything seemed alright.

Oddly enough, when going back to the main menu, the resolution reverted to a smaller-than-native one (without me having changed any setting). This occurred with both ME2 and ME3, but not with ME1 as far as I can tell. In both cases I had to go back into Graphics, set it to 1920x1080 and accept the changes.

For now, the games are again all starting in the proper resolution, so it doesn't seem to be much of an issue. Just something I noticed. Looks like the game needed that one-time custom setting in order to remember it correctly.

For the record, my screen is set to 125% scaling (which is default on this type of notebook), so maybe this had some kind of effect on it.