On the startup screen with the "Now Playing" on the top right, could there be an option to search for certain collections of music and play those instead of random ones automatically? Sorry if I worded this weird.
You can also click on the top right button that is labeled "Jump to Window" on mouseover. In the menu that pops up you can select collections from a dropdown on the top. And yeah, then just click the first song and only songs from that collection will be played. Only works while you keep that menu open though afaik and you can't chat in this view or anything.