I am currently working on adding SecurityPanelController interface support to my smart home skill. I was able to implement everything per the API documentation. During my testing, everything worked well except while trying to get an arm request with isArmInstant=true.
Unfortunately, the documentation doesn't give the utterance example to trigger that feature. I tried "Alexa, arm device name immediately" and I get a response that the device doesn't support that. I can confirm that supportsArmInstant=true is part of the security panel device discovery configuration object.
What is the expected behavior of that feature and what is the utterance to trigger it?