Doorbell 3 Plus - Hardwired charging issue (UK)

Hi, Another user here having issues with battery draining despite being hardwired to an adaptor to trickle charge the battery. My Setup : Video Doorbell 3 Plus (2 years old) Firmware version 10.0.39 2 x Batteries (swapped over every year) Hardwired to the correct version of plug adaptor Ring Chime (2nd Gen) Both devices on their own WLAN SSID Both devices showing RSSI between -50 & -57 RSSI Location is in SE England so not very harsh weather. Issue : The Ring app alerts me that the battery is running low. - The device health via the app shows it's hardwired and the battery icon in the red but charging. - The device health via the Ring site 'MyAccount' dashboard says the Doorbell is on battery. - The battery level slowly drops as if the adaptor is not trickle charging, despite saying it is on the app health and battery icon. Resolution attempts : - Removed Doorbell from the app. - Factory reset Doorbell. - Changed batteries. - Swapped over the adaptor wires at the back of the Doorbell. Some screenshot links : Site dashboard health https://imgur.com/ZTKZVn3 App Device Health https://imgur.com/CxpXx0J App battery status https://imgur.com/F24tGS5 I did turn off the advanced motion detection last week and went back to the standard default zone detection, with 2 minute recordings of each motion captured. I thought that this had drained the battery too quick for it to trickle charge back, however going back to the advanced motion/zone settings this has not resolved the issue. I'm think that's pretty much all I can do without phoning support. Any ideas anyone? Thanks.