Having a problem I've never experienced before. I will connect my iPhone (12 mini) to my Macbook Air like I always have, click trust, and then I drag a playlist I've recently made on my Apple Music onto into the iPhone. The playlist name will then show up on my phone, but only 10 or so songs from the playlist of 40 will make it onto the phone. The rest of the songs are blacked out.

I have tried everything at this point. I've even started from scratch deleting ALL music from my iPhone first, but no change. There is also another bizarre thing happening where when all the music is cleaned out of the phone, then I attempt the transfer of the one playlist that I want, but multiple playlists will transfer instead (not just the one I want, but another older one that is still on my Apple Music). With the other playlist I didn't intend to transfer, all the songs are blacked out. Just seems like a complete mess of problems happening, overall.

The iPhone still has plenty of storage on it and is also completely up to date.

Can anyone help? TIA