Doorbell 3 sees new battery and charge level but also says no battery so no live view

I have an issue with my video doorbell 3 (it’s about a year old) where it no longer registers in the health screen that there is a battery connected, but if you go to the main summery screen it shows a full battery (I have swapped numerous batteries)I have tried resetting the device without much luck, when I do it often it struggles to pick up the WiFi again, the router is about a meter from it and never had connection issues before.Any help gratefully appreciated.Apart from that the door bell works fine, it just won’t let me use live view “because there isn’t enough power in the battery … aparently.