Looks like in the latest Fire TV OS (126.96.36.199), the app image used by Settings is quite bad for most / all applications. Is it possible that some image was not supplied during the app submission, or rather Fire TV Settings is picking a wrong image, and needs to resize it and change aspect ratio, causing those problems? For our app, it seems to be that the App Icon 1280 x 720 was used and forced to be a square image. However, we did also supply square logos with 114x114 and 512x512 resolutions. On the other hand, Amazon Music logo is rectangular and potentially keeping the original aspect ratio.