For example, in the Apple Music "For You" section, I start playing one of the suggested playlists. While that is playing, I am browsing around in Apple Music looking at other things (but still listening to the original playlist).
Now I want to go back to the original playlist. I can't find any way to do that, short of opening up "For You" and scrolling through it trying to find the original thing I tapped. (And it doesn't help that the "For You" section refreshes itself while I am scrolling, making it a frustrating moving target.)