People seem to have asked this question before but I cannot find a solution or confirmation if this is a bug or not.
I cannot use right click to look around when in 4K full screen. My frame rates are fine (35-45 fps). If I reduce the vertical resolution by a pixel (3840x2159), everything works fine. Additionally, simply moving the mouse around in 4K full screen dramatically degrades the frame rate. This issue also disappears when using the custom 3840x2159 resolution.
Is this a known issue or something on my end?