1920x1080 with any UI size, any rendering resolution. Experiencing length-wise stretching. My ratio should be 16:9, however I can not seem to change to that.
Issue exists in current exp only. (I am running a duel monitor set up)

Switching to my 1600x900 monitor the issue persists, however resolution is changed properly automatically.

I experience a similar issue if I run the game for 3+ hours. Restarting the game fixes it slightly, restarting my computer resets it completely.