Doorbell lighting up but isn't charging?

I use the ring doorbell, and charge via USB. I've never had an issue charging (less than 6 months old) but today while its plugged in - the app will not show its charging. The device itself is glowing blue, but the app says I need to charge soon. I've held down the orange button for 15 seconds and tried to plug it in again, Same issue. I've also changed cords, plugs and moved it to a different wall.. same issue. Wifi signal is strong& I've had no other issues before this.