Do you have VSR and GPU scaling enabled? Fullscreen?
What monitor? What is the native resolution?
vsr and gpu scaling are disabled.My monitor is benq xl2411 it's native resolution is 1920x1080.The thing is when i revert the driver to 18.3.4 i can still play with that resolution so it is definitely a driver problem.
Same problem different game, the resolution 1400x1050 has also vanished from windows display properties and the driver will not allow it as a custom resolution. trying to force it in cfgs in some older games results in those games running at 640x480
I'm unsure whether this would count as an error in the new driver, or a correction with the new driver. Seeing as you mention your display is 16:9, it wouldn't be able to display a 4:3 resolution properly anyway. The fact that it was an option previously could be the error, and it has now been fixed so that it no longer displays an incorrect resolution option?
Given that 1400x1050 is the only 4x3 resolution to have disappeared this is unlikely (640x480, 800x600 and 1024x768 for example are all still selectable). besides which 16.9 displays have always supported 4x3 resolutions either by stretching or with black borders.
Almost all the 4x3 resolutions are gone now, the highest available one for me is 1152x864, even 1280x960 is gone, the 5x4 res 1280x1024 is still there but basically useless