Siri won’t turn off alarms

Whenever I attempt to turn off siri by saying ‘Hey Siri, turn off all alarms’ she now just disappears. I used to use the feature all the time and now it just won’t work. It sets all my alarms fine, but won’t turn them off.

I have attempted to turn siri on and off again. I have restarted my phone. My iphone is also up to date with all updates. It just won’t work. Any advice?