Reloading downloaded iTunes Match after a restore
Since July I've had 3 iPhone 6+'s fail (touch disease) and I've been through the backup/restore process 8-10 times.
I am now tussling with incredibly bad iOS 11.1.1 performance on my phone. (It has 55G free, I've turned off background processes, I've pretty much done every proposed tip except a full reset/restore and lagging apps, unusable Siri and undependable bluetooth are killing me.)
I use iTunes Match but I keep a lot of my music downloaded on my phone because I am often in areas with limited coverage and I like to have access to the music.
After each restore I've done, I've had to select the playlists I download and let the phone download them again even though all of that music is sitting in a mac its connected to.
Is there anyway with iTunes backup on Mac to have the locally downloaded music in the iPhone included in the backup?
iPhone 6 Plus, iOS 11.1