Apple iPhone Refuses to Play 90% of My Music and Audiobooks: “song is not currently available in your country or region”

Out of the blue today—first time ever—my iPhone 7 Plus running iOS 13.6 now refuses to play 70% of my legitimately-owned music—200GB or so, with tracks selected for refusal randomly selected eg 3 of 12 tracks on every album can be played, but not the others.

• The same music plays on the Mac and on my iPhone 6S Plus.
• Rebooting and re-syncing the iPhone makes no difference. Quitting apps makes no difference
• NONE of this music has anything to do with ANY online music service.

Reckless and feckless “leadership” by Tim Cook continues to produce manure-grade software with Apple Core Rot is now far beyond outrageous.

UPDATE: looks like a NASTY bug in iOS 13.6 or perhaps Music.app: it is re-syncing 20,000 tracks onto the phone—tracks which were there for the past 3 or 4 years. WTF?

70% of music is non-playable "song is not currently available in your country or region"

Anon writes:

I have exactly the same problem, but worse, even music and podcasts I recorded myself at conferences & church tent meetings can not be played. Total crazy.

MPG: thank you Apple for feckless engineering.