Homekit Automations are broken in iOS 16
Since iOS 16 HomeKit automations aren't triggered reliably. Simple timed automations like "Open Shutters at 9am" are triggered randomly. All my Hubs, Homepods, iPhones, etc are up-to-date, restarted, reseted all the devices, recreated all the automations, but still not reliable.
My only solution at the moment is to schedule the automations with the accessories' own hub. (eg. IKEA light automations are set in IKEA's own app, and my Bosch smart home shutters are scheduled within Bosch's app) It works, but would be better to see everything within Apple's Home.