Mine have stopped having the problem. I didn’t notice exactly when, but I think it was around the update that changed the WiFi and Bridge signal reporting from RSSI (dBm) to ‘Good’.
My steplights are now on firmware 1.8.3-29 and the bridge is on 120300432. Interestingly, the bridge still reports in RSSI.
The bridge also seems to do “Health Checks” very infrequently (the last reported Health Check was 5/8/20 3:45am, today is 5/12/20 9:25 am). Lights don’t say how frequently they do Helth Checks. It’s possible they just disabled Health Checks to avoid bouncing the lights so often.
It would be nice to hear back from someone from Ring.