Disabling anti-aliasing gets rid of the artifacts 🙂
The game only supports 21:9, so this might be an engine restriction.
Does it work correctly in E2 or ME3?
Sadly no, it's the same in Mass Effect 2: https://i.imgur.com/0q6PWXo.jpg
And 3: https://i.imgur.com/592vB1J.jpg
and in 2 I noticed another strange issue with the game where the subtitles are positioned in the center of the screen and too large to fit into the width of the game: https://i.imgur.com/JdyK66n.jpg
Strangely enough this part seems to stretch to almost the entire width of the monitor: https://i.imgur.com/xqPWyiY.png
Definitely possible it's an engine restriction, though I've tried several other (non-recent games) in 32:9 without this kind of issue. But it might be unique behaviour in this particular game engine
