Game Resolution

I recently updated to the latest version, and fullscreened my game out of windowed mode briefly. Upon returning to windowed mode, I was unable to return my resolution to the size it was, with only the three x768 options available to me, with the x720 option I was using missing. Is this intentional or some bug? x768 is close to unplayable for a lot of games for me as it cuts off the bottom of my screen, so I was curious if this was by intention or something that needed fixing. Thank you.

Sounds like a bug:

Thank you.