Stick Up Cam (3rd Gen) keeps going offline

I have several Stick Up Cam (3rd Gen) that are only a few months old. They've had a lot of issues. First two of them all of sudden stopped charging through the solar panel. Changing solar panels didn't help. I found many ofther posts about this going back a while, and there has been no solution. For lack of anything else to do, I just kept rebooting them every day. And not sure if it was the solution, but they just one day started charging through the solar panel. Now, just this past week, one of them keeps going offline by itself. So far, eventually it reconnects by itself--usually after less than 24 hours. I've tried rebooting, removing the battery, and power cycling the router. And it hasn't fixed the issue. The RSSI is -54, and it's always charged at over 90%. Anyone else having these issues? Any suggestions? Is this a firmware or hardware issue? Are the Ring servers losing track of the camera? This has been a bad batch of cameras....