Video Doorbell Pro - Disconnects from WiFi in seconds

Hey all - Ok, so I've got a Ring Video Doorbell Pro. Installed no problem, and has been running flawlessly for a month or so. However, as of last week, the device drops from WiFi within seconds of connecting. I've tried 3 different WiFi networks, forced 2.4, everything I can think of. The AP is maybe 10 feet from the doorbell. Transformer voltage is good (green), RSSI is 46-49 (green), and when I reconnect to WiFi, all networks have full signal strength. I have set things up so that the only thing between my AP and the doorbell is essentially the front door. But as soon as I get the device connected, it drops within seconds. But prior to last week (and no, I didn't change anything on the doorbell or my network infrastructure) it was staying online with no problems. I also have a Spotlight Cam Plus, which is about 50 feet away from the AP, and it never drops connection. Same WiFi network, higher RSSI value (63), but it stays on all the time. Any thoughts as to why my doorbell would drop like this? Thanks!