@Toy4Rick, @michaelahess, @bamarayne
If you find another delayed piston, and if you have any device in the house (motion sensor, button, contact sensor, etc) that triggers the firing of any piston, can you please try tripping that and see if the delayed piston recovers? Also, you may need to pause/resume the often-delayed piston because it needs to subscribe to an event it wasn’t subscribing before, so if you haven’t changed that piston recently, those recent improvements to CoRE may not be active for that piston. Let me know if that gets the delayed piston going or not please.