I have 32:9 resolution monitor and I had a probelm that game GUI elements, cutscens, movies was using 4:3 aspect ratio. Elements like phone was broken.
My resolution was 5120x1440p, after try and error I found out that game have a limit:
-borderless -width 5040 -height 1440
5040x1440 resolution will still render proper 16:10 elemnets, any number above makes a trouble. I send request to rockstart support. Meantime workaround for 32:9 resolutions