I’m having problem triggering Siri when I have the Apple Watch, my HomePod mini and my iPhone all together. I’ll say “Hey Siri” and I’ll see all three devices come on, and then all three devices turn off. Doesn’t happen all the time, but when it does happen, it happens consistently. I can say ‘Hey Siri’ 3 or 4 times in a row and all 3 pick and then all three stop, I assume thinking one of the other devices have it.
Another problem I had today was that I have the Apple Watch up to my mouth and I said Hey Siri and the watch did not respond. Then I say Hey Siri again the phone in my pocket says “Uh huh?”
Both Apple Watch and iPhone can listen to Siri, but they do not always respond to the same Siri request simultaneously. When you say “Siri” or “Hey Siri” near multiple devices, the devices use Bluetooth to communicate with each other and determine which one should respond to the request.The device that responds is the one that heard you best or was recently raised or used
To ensure that your Apple Watch responds to Siri requests, you can press and hold the Digital Crown to make sure it is the only device that listens.For your iPhone or iPad, you can place it face down so that Siri doesn’t respond to your voice
If you have a HomePod, you can say “Hey Siri, turn off Hey Siri,” or use the Home app to turn off Listen for “Hey Siri”
To turn it back on, touch and hold the top of HomePod, then say “Turn on Hey Siri”
Keep in mind that Siri features may vary by country or region