[FEATURE REQUEST] Controller should go on search mode while xbox restarts.

That is a feature that I never used but many have requested that feature or something like it be returned. I am sure there are posts
HERE that are requesting it so you might consider going and searching for and voting for the feature.

If you want the ability to block this feature then you need to request it.

http://xbox.uservoice.com/

If enough people were to vote for it then it might happen.

So search that site and if has already been requested you should vote for it. If it hasn't then you should request it yourself.

Hi Snowman578! My name is Ricardo an independent advisor ready to help you with this situation!

For remote installation the device must always be in instant on mode and activate remote functions

To get going, enable remote features on your Xbox console.

Sign in on your console using the same Xbox profile you’ll be using on your mobile or PC app.

Press the Xbox button on your controller to open the guide and go to Profile & system > Settings > Devices & connections > Remote features.

Check the box to enable remote features.

For the power mode, select Instant-on.

Note If the power mode isn’t Instant-on, remote features won’t work. This is so installation can start even when you’re not there to turn on the console.

Regarding the xbox controller problem, if you have done all the steps you mention and it has not been solved, unless you are linking it with other devices while it is off, you will have to send it warranty

Hello,

Try this:

Go to the Xbox Accessories app and click on the beaker to enter test mode. Then, click the button that doesn't work. If it shows that you pressed that button it should work. If that doesn't work, try updating the controller or hard restarting the console.
Do that by holding down the xbox button for a few second until the light fully shuts off. Then after you restart the console, try using the controller. If these don't work, you may need to replace or buy a new controller.

Hope this works.

Yeah, one of the features I requested is to have it automatically ask if you want to go into that mode if Xbox Live is down or you can't connect for any reason. A lot of people don't know it's there.