Ring Losing WyFi

Two of our Ring devices are going in and out of service. One is a security floodlight camera for the front yard and the other is a Ring security camera spotlight for our driveway. The front yard device floodlight is timed to go on and off at preset times which I have programed. The floodlight usually comes on at the preset time, but through the night it may go off and on a few times. The driveway device is always on and the spotlight comes on when motion is detected. But at times the device goes off line for no apparent reason.Our Fios router is of the latest and greatest type. We have Ring WyFi extenders placed strategically in the house.Please help.