Netflix prevents XBox One from turning on

G'day Kurtimus! Sorry to hear about the profile issues when signing in. Let's try a

power cycle to help prevent that in the future. Most of this sign-in behavior has been worked out, but it can still pop up occasionally and a power cycle can help.

Some other alternatives are to disable Kinect sign-in, or use one Netflix account on the console instead of two. Netflix allows users to set up profiles on their accounts now, so you can each still have your own Instant Queue but use the same overall account
to sign in. Doing so may prevent Netflix from switching between accounts when the second user signs in.

Wireless routers can prevent unauthorized network access by using a feature called MAC filtering. Unfortunately, MAC filtering can also prevent your console from connecting to Xbox Live.

If MAC filtering is turned on, try one of the following:

• Add your Xbox One console's MAC address to your router's authorized list.
• Or, turn off MAC filtering temporarily on your router to see if MAC filtering is preventing your console from connecting to Xbox Live.

For more help try the steps
here

You can turn off auto updates in the Xbox Settings to prevent this from happening again.

You are probably running into an intentional block to prevent pirating of video content from ESPN, Netflix and VUDU. I doubt you will find a legitimate work around.

The xbox one consoles have a heat protective system in place to prevent it from getting damaged. If you use the xbox one x, the cooling system that it contains is a plus to help keep it from turning off on you unexpectedly. Otherwise you should be ok.
In the event it turns off on you just let it rest for a few before restarting. Happy gaming friend.