Ring doorbell spontaneously reboots but gets stuck

Hello, I have a Ring Video Doorbell 3 Plus (battery only). Tonight, when I went outside, it had a flashing blue light. According to the troubleshooting information I could find, that means it is rebooting. 30 minutes later, it was still rebooting. When I tried to connect to the doorbell from the Ring app, it said the doorbell was offline. I went outside and removed the battery from the doorbell and reinserted it. A few minutes later, the doorbell was back online and I could view live video on it. I suspect this is not the first time this has happened. Last spring, I was unable to do "Live View" on the doorbell. Unfortunately, I was 800 miles away, so I could not look at the doorbell to see what was happening. The app told me that the battery was 73%, which I assume means it was 73% the last time it communicated, so I don't think the battery had suddenly died when it went offline. However, by the time I was finally able to get to the doorbell (about a month later), the battery had died by that time. When I charged it and reinserted it, the doorbell came back to life and all was well until tonight. Currently, the battery is at 56% and the Firmware status is "up to date." The signal strength is RSSI-43. It's about 25 feet from the router, and the smart door lock that's about a foot away has no problem communicating. When I hold my phone next to the doorbell, the Wi-Fi indicator shows all bars, so I believe the signal is sufficient. Given that the the device has twice gone offline unexpectedly, I'm wondering if the device is defective. It's on a vacation home, so we're not here a lot of the time, and we need a reliable video doorbell to keep tabs on the home. What should I do to get this resolved? ...thanks!