I'm playing on a 21:9 monitor. It looks like the in-game HUD as well as the loading screen use vert- fov, getting cut off slightly at the top and bottom. The HUD is still 100% in view, just pushed all the way to the edges of the screen. Any way I can fix this on my end?

Other than that, the game itself uses hor+ fov and scales perfectly.

This is on the game's end. I wasn't planning on ultra-wide support, so I had the interface canvas scaling halfway between horizontal and vertical widths, to keep things roughly similar across common aspect ratios.