Siri No Longer Responds While Driving, Even With Driving Focus Off
iOS 16.3.1 (though this started back on 15.x), Bluetooth connection to car. Irrespective of whether Driving Focus is on or off Siri now only seems to respond to a very limited set of commands.
While driving I can ask Siri to call someone in my contacts and that works, I can ask Siri to add something to my shopping list and that, usually, works (though Siri does not respond verbally anymore despite Responses>Prefer Spoken Responses being enabled), I can ask Siri to navigate me to some location and that works, but every other request to Siri that I've tried produces a few seconds of the Siri activity globe and then nothing happens and the activity globe disappears. Particularly irritating is that Siri will no longer read aloud recent messages. There is no message, no explanation, it just fails to process the request.
I'm not sure if this is intended behaviour or not (surely not when Driving Focus is disabled), but I can find no documentation saying Siri's behaviour has changed. If this isn't a bug, is there a list somewhere of what Siri can or cannot do while driving nowadays?
iPhone 14