Earlier today, Netflix kicked me out when I tried to stream the Grinch. I turned Pandora on and had no problems streaming music. We've been watching Hulu live all night and I've lost track of how many times it has rebooted. Specifically watching travel channel (Ghost adventures). We have unplugged from the power source; changed the HDMI cord, and reset the Roku. Netflix is running fine now. Hulu LIVE is still causing the Roku to reboot every 5 minutes (if we're lucky enough to get 5 minutes). For fun, we have Hulu Live pulled up on the mobile app on the phone and it's working with no problem. What gives Roku???
If you read the whole thread, you'd have picked up that Hulu Live uses different streams for different devices, meaning a test of Hulu Live on one device isn't a valid test of Hulu Live on another device.
You would have also read that some commercials will cause issues because those are different feeds from the main content. You don't seem to have addressed that; that is, saying it did NOT happen at a commercial break.
I'm gonna use the term "reboot" rather than "reset," as some other users that may be reading might think "reset = factory reset" when it doesn't. So, after a reboot, and before using Hulu Live, do you have issues with Netflix or other apps. The thinking is that whatever is going on with Hulu Live might be having a residual effect on the device overall, appearing to affect other apps.
Your other troubleshooting steps appear to be good and complete. Try to keep these other things mentioned in mind, and see if anything else makes itself known.
Apart from that, some individual channels/apps allow for live streaming. You can use Hulu With Live TV to authenticate them and watch live content that way, for those that support it. Until Hulu fixes whatever is wrong with their app or their streams to Roku, that might be a workaround.