Sorry to hear about this, @prkchp07! Good call on trying other light fixtures. It’s surprising to hear this did not resolve the lights blinking concern. Of course, the lights should not blink randomly, and the best next step here will be to remove the bulb from the app and set it up again. This can be done by visiting the A19 bulb page in the Ring app, selecting Device Settings, and then selecting General Settings. There will be an option to remove device.
Once removed, simply perform a new setup on this bulb to see if it will prompt an update or fresh connection, to resolve this concern. If it does not, please give our support team a call at one of the numbers available here. We’re taking additional steps to protect our team and help reduce the spread of COVID-19, so this has resulted in longer than normal wait times. If you are outside of the US, please read our response to COVID-19 here to see how to contact support. Feel free to let us know how this goes!