We checked the album from the desktop app and the album cover shows complete. However, when trying from a mobile device, it shows in the same way it shows in the screenshot you sent.
Keep in mind that this has to do with the album cover dimensions. From the mobile app, the artwork gets cropped in a square shape as there's less space than the desktop app. If the dimension of the artwork of the album was a plain square, it should not be affected on the mobile app.
However, if you check the artwork of the album from the desktop app, you'll notice that is not completely a square. The dimension is different, so that's why it gets cropped on the mobile app. You won't get this issue with the cover of another album that shows as an actual square.
Let us know if you have questions. Have a great day!