2 bugs I encountered in my short testing with playing music files locally:
-artist thumbnails aren't showing when images placed according to: https://www.hifiberry.com/docs/hifiberryos/hifiberryos-handling-local-music-libraries/
(p.s. the article needs some updating according to my other post in this forum for where to copy the images to)
-running RPi4 w/ latest beta on GitHub, screen content won't fill to my monitor's full available view. I run 1920x1080 monitor and the content is shown only in the upper-right corner (so a little more than a 4th of the screen is used)