"Add again" and "Skip" options; skip just skips entire playlist now

I'm an avid playlist maker on apple music (i make playlists for everything, including monthly themed ones etc), i used to be able to add a previously made playlist to an established playlist without duplicates in the playlist; pressing "skip" would only add the new songs. However, while trying to do just that, when I press skip at the pop up, it skips the entire playlist itself? I can no longer add the new songs from that playlist without pressing "add again" and adding ALL the songs. This is such a pain and I have no idea why Apple changed such a non issue? Is this a glitch or a new update?