Ring video doorbell pro poor voltage

I have two ring video doorbell pro 2’s wired and before I got the second I was showing poor voltage in the app only once and a while. Now I have two hooked up and it is mostly showing poor voltage but power output is level 1. They both seem to work fine and sometimes the first I had hooked up will show good. I also ordered the ring transformer as I knew my original was old but it still is showing poor voltage. It shows 15 volts when you click on it but I had a multimeter hooked up and show 16 volts. Is this a flaw with the device or is there an issue, as I said they seem to work fine but why is it saying poor voltage? Has anyone else run into this and just let it go as I don’t want an issue but yet I would prefer not to have to use a plug in adapter and I can not add another transformer as it is wired way too far from panel. Thanks in advance for any help.