I am setting up HSM and during my testing I found the alerts still continue even after the alarm is disarmed. I am using a tablet to arm and disarm and would like to the disarm option on the dashboard to stop the sirens if accidentally triggered.
I also have the same problem, disarm is not the same as "cancel alerts" and even then you'll find cancel alerts does not respond immediately.
What type of sirens/alerts are you using?
I am using Honeywell wave 2 tone sirens that are part of my Konnected alarm system.
https://www.amazon.com/Honeywell-WAVE-2-Two-Tone-Siren/dp/B0006BCCAE/ref=sr_1_3?dchild=1&keywords=honeywell+siren&qid=1613259850&sr=8-3
Ah, there maybe additional intricacies with the konnected interface. I only have zigbee and z-wave sirens, and those almost never cancel immediately, even after hitting disarm/cancel 50 times, while my wife is screaming "make it stop"
Not sure if I had a similar issue but what I did was create a rule that turns off my sirens (they appear to HE as switches) when HSM disarms. That seemed to fix my sirens continuing to sound for me.
I have this hooked up to a z-wave plug
https://www.amazon.com/Epsilont-Outdoor-Self-Contained-Electric-Security/dp/B01E9P0G5K/ref=sr_1_9?dchild=1&keywords=120+db+2+tone+siren&qid=1613281229&sr=8-9
That's one serious siren!