Same problem here, and it just restarted this autumn. Lights immediately turn on if turned off. Reducing sensitivity increases the time but eventually the lights turn on for no reason. Camera has been installed for over a year. The only solution is to turn off camera completely. There is no wind, no motion, no nearby heat sources. It makes no sense.
I hope this is being worked on. Between this, slow time to connection, and no HomeKit support, I might get rid of all my Ring devices and the monthly subscription.
This is ridiculous.