Wired floodlight not coming on at scheduled dusk to dawn

I have 3 ring devices; 1 doorbell on the front door, a wired floodlight camera on the side of the house and another at the rear. Both floodlights have been scheduled to come home at dusk til dawn 7days /week. While the rear one has done this perfectly from day one, the side one stopped doing it after a few days. I've tried rescheduling it and it didn't help. Usually I have been manually switching it on in the app, but now it has taken to cutting off the light sometime after I do this. I do not have any motion set for the light, btw, at night I want it on. It is very annoying as this is the area that I need lit most at night.