This performance drop occurs ONLY when I run my project as a Standalone game (or packaged game), and set my resolution to 1920x1080 (my default monitor resolution) in fullscreen. Stat unit and stat fps say my fps is 22-23. One might say I have a bad GPU, but my GPU is GTX 1070 OC and reducing the graphics quality to LOW doestn’t help at all. When I disable VSync my fps goes over 200, but the lag remains. I think my monitor might have something to to with it, because this along with other problems, like problems with my monitor’s aspect ratio didn’t occur when I was using a DVI cable, now I am with an HDMI cable, and different monitor input.
An interesting thing to point out is that, if I set my game to fullscreen with Alt + f4 AND it is a Standalone game, NOT a packaged game (with the packaged game, there is no way to get rid of the lag), the lag disappears. What!?
I have absolutely no idea what might be causing this problem, but I am near shipping and have to take care of it fast!