I've been having the same problems as well. I have also taken all the same steps and done everything they have asked of me. I even had my Internet provider bring new gear out to my address and set up new lines as well. I even went as far as bringing out an internet specialist to specifically tell me what was the probelm. One thing that we both noticed and realized after running almost 4 hours worth of tests and running different types of settings, every time my Roku boots me off it's always only when I had another tv or another device (not actual camera device either)(more like a cell phone or laptop or tv) trying to view the same live feed from my camera that was already trying to view myself. Each and every time I would turn one feed on if the other TV was already viewing the live feed, it would boot me off each and every time giving me the same exact code. I have called Roku about this and tried to discuss it with them and they constantly blew me off and their only comments to me on all 6 times I called and spoke to them was that "nobody can access my Roku account without my Roku credentials and they would need to have your info to view your live feeds"! They blew me off each and every time. I even went as far as taking screenshots of the devices that were logged into my account and on my Internet and showed them and they still denied any account security issues. So I wish you luck and figuring things out and hopefully you will have better luck than I have had with them.
I have not had any luck with Roku. They refuse to respond to me at all. I never connected any devices other than my phone to my camera. I was wondering if someone else has hacked it. But after changing the name and password of my Wi-Fi, they shouldn't have been able to access the camera. I don't know. I have purchased a new camera from a different brand, and will be requesting a refund from Roku. Not holding my breath on that since they will not respond to me at all about this issue.
For anyone thinking about getting a Roku camera, don't.
