Black Video recordings

I am having a strange issue with one of 5 Ring Stick Up Cameras. All of them are on the same wifi network and powered by USB.On the App, I can see all of thre cameras live streaming, refreshing after a short time.When you go into the problem camera, I cannot see the live stream (Will not connect to the camera). It is definately recording and showing recordings in the timeline, but all of the entries are black (No Picture). They play like any normal video file.This has been happening on this specific camera for 3 days.RSSI is -68 (Most of the other cameras are around that figure, but it's not the worst of the bunch).Device health is good. The camera firmware is apparently 'up to date', and my wife also has the app and the same issue with the same camera, so I have no idea what to do.All of the cameras are a few months old.