Ring cameras offline in night

I have an indoor cam ( wired ) a ring door bell ( battery ) and a floodlight cam on the garage ( wired ) in the early hours of morning my floodlight cam generally looses connection and the light comes on for 30 seconds at a guess. The indoor cam will do the same but the doorbell doesn’t it stays connected. Any other device connected to the WiFi at the same time is still connected ( ie phones , iPad ) I bought a net gear router extender but that’s had little impact . Very strange how wired items loose connection at same time with no evidence of power loss ?