Doorbell plus3

Along with others, I too have issues with my plus 3 and WiFi. Health check currently shows -82 yet download speed outside, beside the doorbell is 134 mps. How can this be? The doorbell worked for 2 days then stopped. Heva from customer support took me through a hard reset but it still does not work effectively. I think it will be getting sent back and I will install a spy hole.