Ring Doorbell not charging properly

HiI am having an issue with my doorbell as it's not charging properly.The doorbell itself shows a solid blue circle however the app shows that the battery is draining - even though the actual unit is sitting next to me plugged into a wall charger. I don't understand it. I know I can contact support but this unit is a replacement under warranty for a previous unit with an identical issue so before I start contacting support I wanted to see if you wise people could help.It's not hardwired inI've tried different cables and different wall plugs - all of which do work with all the other devices in the houseI've tried logging out the app and back in (including even restarting my phone etc)Signal strength is RSSI-47I've run through the troubleshooting thing on the app - to no avail.Can someone help?I'm on the verge of giving up on Ring and getting a similar product on Amazon!