Why does my 1st controller turn off when I turn on the second one

Hi,Artemis ! I'm Luis, a fellow Xbox Gamer . Thanks for reaching us out here.

That is quite odd, let´s attempt a power cycle to try and get rid of this error

Turn off your console by holding the Xbox button  on the front of the console for approximately 10 seconds. The console will turn off.

Once the lights on the front of the console, unplug the power cable from the rear of the console.

Wait at least 2 minutes

Turn your console back on by pressing the Xbox button  on the console or the Xbox button  on your controller.

I also use the Chatpad and have it plugged into a second controller.

When you want to switch over to the Chatpad just turn off controller 1 by either holding down the Guide button untill the "Turn off controller" option appears or take the battery out of the controller.

When you turn on the 2nd controller with the Chatpad attached it will be assigned to player one.

Note that if you turn on the second controller while the first is still on it will become player two untill the XBOX is turned off, so make sure the second pad is activated AFTER you have turned off the first.

Hope that makes sense.

Mine does this every time I turn it off via the controller's guide button. i normally have to hit the console button again for it to turn off properly. I never have downloads running when I am turning it off, so I don't understand why it does this.

Hey OP, that's certainly odd. When the second quadrant lights up, does the first one go dim? Or do they both light up for a short time? Also, is it possible someone in the house is turning on then turning off a controller remotely?

You could plug your controller into your Xbox as well and that should stop the controller from turning off due to inactivity I believe.