If you don't mind, do you have any special setting on? Lockdown mode or something? Are you able to play the music back if you use the Voice Memo app to record a bit of it?
Sorry about all that, hopefully we can figure out what's wrong!
> Lockdown Mode is an optional, extreme protection that’s designed for the very few individuals who, because of who they are or what they do, might be personally targeted by some of the most sophisticated digital threats.
I'm concerned that the app does not work at all in airplane mode - like, even navigating between pages ("return to home" from a failure).
It also doesn't work (even without airplane mode) for songs that Shazam fails on - so I guess we've confirmed that that's how this works!