No Video Found -- intermittent

I have a modern Ring doorbell. It has worked perfectly until recently -- past 3 weeks. Now maybe 70% of the "motion" detected" indications have no video, "No video found" . The signal strength is RSSI-68 and consistently so. My home wifi, as is my internet, is solid and the wifi-router is 20 feet from the doorbell. What could be causing this? Should I do a factory reset? Thanks Al (Santa Clara ca) One more thing. When I check "System status" (device health) is states "No downtime today". This is not true since it also reports that some motion did not produce a video several times today. Odd to say all-okay when it's not.