Ring Doorbell Wifi drops after 10 minutes

I've had a video doorbell Pro kit for 2 days, it all set up fine but after around 10 minutes the door bell loses wifi and goes offline. I've re-connected many times over the last couple of days and this happens every time. I've checked the power which is 'Good' at 4015mV, the last reported signal strength is RSSI -44. I've pinged the router many times both at the router and at the doorbell with the door shut, the ping is always around 50ms, never above 60. Is there anything else I can check?