Recently every time I turn on the TV I get a “Welcome” screen for a few seconds like when you reset the box?
Are you turning the TV Off, or the 360 Off, or both?
Are you using the 360 remote to turn off the TV? If so, which button on the 360 remote?
The white power button on the left hand side of the 360 remote only turns off the TV.
If you use the red power button on the top right hand side of the 360 remote then it switches Off the 360 set top box, and if One Power is enabled on the 360 box it will also switch off most TV's at the same time.
If you turn off the 360 box by the rocker switch on the back of the 360 or by the wall socket then it turns it off completely and displays the Welcome screen when rebooting.
My 360 box shows the Welcome screen and I have to sign into most apps if the box receives an over the air update, or if I turn it off using the One Power button, the rocker switch or the wall switch.