Arc visuals: By design or visual bugs?

[Suedkiez (Just a fellow user like you)]

The shadows are on purpose in principle, I think, but can be off. You reported something like this here

B139-B81 Odd Grey box ruining now playing screen

Thread is here: Can’t seem to move it here. On android Arc seems to have elements tied to the width of your screen and it results in a very ugly now playing (depending on which phone you have). I’ve seen this issue on a Z Fold 3 and Xperia 1 iii. I saw in one of darkos videos he has it albeit much more subtly (if your phone is wider, the effect is lessens). Assuming this is a bug and not intended. I’ve seen this on every build of arc, it’s not tied to the latest version specifically. […

There is also

ARC Custom Artworks have wrong shadow image

Hi, Just a heads up when you have Album artwork that is not a square it has the square Album background. A quick and dirty solution would be to leave the background away when the image isn’t square in dimensions. [IMG_0745.PNG] [IMG_0744.PNG]

I can’t see the weird lines in the first two pictures, might be my current device (phone)