I just setup my Raspberry 3 with the official image and a original raspberry pi camera. Everything works fine. Except the video stream. In the configuration under "Test image" or "Test video" no signal from the camera shows up and when i log into the application from my phone i see the video stream for a while but then i get a black screen and i cant refresh the stream. I would have to reload the URL in the browser and then it works again. I also seem to lose the connection because i can't control a connected realay anymore.
But it works, when i log into the application (IP in my mozilla browser on my pc).