I have a scene that is acting as my home security alarm and I am having some trouble with it. The scene is set up to trigger every 30 seconds with a condition for a virtual device at the on state for 45 seconds. This scene is set to turn on my siren. This setup works great and then for some reason after a while it just stops triggering. The only way to fix this seems to be to create a new scene and delete the old one. Does anyone have any ideas to have a more reliable alarm setup?