Ring Doorbell2 started showing power source as battery after 2 years

I have a Ring 2 that is just over 2 years old. The other day I received an email saying I needed to recharge the battery. 1st time that has ever happened so I looked at the device health and it showed the power source was battery and not hardwired. It's always shown hardwired. I pull the doorbell check all the connections and it's getting power and everything is connected. Was there a firmware update recently or something that killed this. I don't understand why it would do this after 2 years.