I am having similar problems with my Nest cam. It first started with the doorbell. It stopped working. And so did the two-way speakers. It used to be able to record events, but now when someone gets within 10 feet of my front door, without fail, that's when the camera goes offline. As soon as that person moves out of camera view, the Nest cam is live again! What good is a security camera if it will not even record strangers at my door? It used to work great. I know it's not my internet connection. I have tried resetting, rewiring and everything else I can think of. I also had an indoor Nest cam, and that one stopped working last year. Is it the Nest brand? Sure looks that way. I have a bad feeling the answer to your question, and to my own Nest trouble, is to buy a new doorbell cam. Obviously, not from Nest.
