[SOLVED] Airplay crashes frequently since moOde 9.x

[TheOldPresbyope]

Were I you, I'd first try either

1) running the Pi 3B+ outside the steel case, or

2) using an external USB-WiFi adapter, perhaps even one with an external antenna

to see if the received signal strength improves enough to get reliable AirPlay performance.

Candidly, I doubt the existing Pi 3B+ is at fault (but I've been known to be wrong before...).

Regards,
Kent