On my OnePlus 5T, the Spotify app doesn't completely go to the navigation bar. There's a bit of a gap visible between it, and Spotify's bottom navigation. I'd really like to see this fixed, as it's quite annoying. 18:9 displays have become incredibly common now, and I don't get why Spotify still doesn't completely work properly on them yet. So yeah, I would really like to see this bug fixed. Screenshot is attached below.
Also, to anyone thinking it: No, it's not an issue with the navigation bar, as no other apps I have installed on my phone have this issue.