I am having the same problem with Apple Devices not identifying the actual IOS on my iPhone (like poster Cfoster 3448 Apple Devices tells me I need to update to 17.4.1 when my phone says that's what it is running).
I was finally able to successfully sync a playlist to both my iPhone and my iPod Touch by paring the playlist down to about 10GB of audio. I should be thankful...at least now Apple Devices finishes the job it starts.
It is evident over the course of the last few weeks that Apple is, in its own way, trying to tweak Apple Music for Windows to make it perform more like iTunes. For example, when I first converted over from iTunes, to import audio files into my library, I had to select each file for import; a few days ago I noticed that I now have the option to add a folder. That's an improvement - thank you. I also appreciate (and this is huge for me) the ability to stream lossless audio on my Windows PC from Apple Music that until recently I could only do on my Apple device.
A welcome improvement would be for Apple Music to include a function to play/extract audio from audio CDs. iTunes could do it; Apple Music cannot. Along with that is the iTunes ability to convert homemade audio files into AAC or ALAC has disappeared.
Another thing that iTunes did well that Apple Music does not at all is display libraries like spreadsheets. This made tag editing very easy, and also made it easy for a user to see if an error had been made in library management, because iTunes could display album and track counts in ways that Apple Music doesn't. In Apple Music, I have yet to find a way to see how many albums I have in my library. I know I can see how many albums are tagged with either the same genre or artist, but neither of those are practical options for the whole library (especially for us geezers who have large libraries).
Long story short, with iTunes, I had a tool that, for library management purposes, was nearly self-sufficient. Without iTunes I have to use three other applications to do efficiently .
[Edited by Moderator]