Siri doesn't know that my front door is called "FRONT DOOR". I only have one smart lock, which works perfectly, and it is called "FRONT DOOR" in HomeKit. When I ask Siri about my FRONT DOOR she responds that she cannot find it. When I ask Siri about the status of my DOOR, she responds with "The FRONT DOOR is locked/unlocked". I'll then say 'Alright Siri you literally just used the phrase "FRONT DOOR" five seconds ago…
Me: "Siri, turn off the bedroom lights."
Siri: "OK. Your 6am alarm is off."
For the most part Siri works for me, with the exception of the above and her insistence on adding "ginger ale" to my grocery list as two items.
/Native English speaker, specifically trained in non-regional diction because I used to work on-air in radio.