If your automations are triggered randomly or not at all on iOS 16, it could be due to a bug from the accessory or an issue with the Home app on iOS. First, try deleting and recreating the problematic automations. If the issue persists, consider scheduling the automations using the accessories' own hub, such as IKEA's app for IKEA light automations or Bosch's app for Bosch smart home shutters. This temporary solution allows you to have reliable automations within Apple's Home app.