Apple Music doesn't sync across devices
I have a Macbook Air, a current iPhone 13 and an old iphone 6S that I use as an ipod. I am creating/editing playlists on both the Macbook and the iPhone 13.
Invariably, changes in one place do not propogate elsewhere, many changes revert or do not stick (particularly changing playlist names or adding/removing songs or changing song order).
I have read every support article I can find and I'm stuck. I have ensured that syncing in on on all devices, they are connected to the same wifi network, I've turned syncing off, then on again to try to get things to re-sync, but each day, I find my devices are out of sync.
Here's one example - created a Rolling Stones playlist on my computer with 10 songs on it yesterday.
On both iphones, it's this (note it's only got 4 songs on it)
This is true across many playlists.
Another example - created three Dylan playlists - here's the directory on the computer
On the iphone 13 (not updating, 2 playlists missing)
On the iphone 6S, the names are duplicating and each playlist has 3-4-6 songs on them, not 10.
Can anyone help? I make playlists and am trying to organize my library in a way that is useful to me, but I can't make progress on having the music come with me.
I also had lots of problems with songs greyed out, but that seems to have gotten better in the past few days.
MacBook Pro 13″, macOS 12.4