@TP-Link Hi support, Thanks for taking an interest in my issue. Maybe you're right and it's more of an Apple problem, but the reason I added to this thread is that "I" start on the same Deco with...

@RetiredInFl I have sort of the same problem: I use Apple speakers with Airplay 2, and since a few months they won't play together well UNLESS they're connected to the same DECO unit. The same holds...