Is there a way to stop the Xbox button from taking you to the home screen on mobile?

I did read your post. You mentioned hitting the Xbox button then exiting the home screen so you cannot take a screen shot when on just the home screen.

Also another issue I'm having is on a second xbox one where it says syncing data whilst on the don't overexert yourself screen. It then takes a while to sync (or so it appears) and then goes into a black screen. I then have to use xbox home button to exit
out. I also retried this by cancelling on the sync screen and then selected stop syncing but this time it reset to the home screen.

Hello Happy,

thanks for coming to the forums with your question. You can hit the Xbox button also called guide button on the controller. Will bring up a menu on left side, home will be highlighted. You can hit the A button on home to take you to the home screen, or you
can go down to the game you playing hit the start button one with 3 lines, go down to quit. This will take you to the home screen also.

Thanks,

Brad

From the home screen you should be able to scroll to the right under the Store tab where it shows (Games, Movies & TV, Music, and Apps). Any one of those you select should take you to the main back for that selection. Once you select the Store tile from
your home page, you can hit the Xbox Guide button so it minimizes to the home screen, then hit the Menu and select Quit, but this will not close it out and restart. The only way I have found to do it is to scroll to the right each time.

Yes, you can stop a game or app from running. Hover over the game or app tile on the Xbox Home Screen and press Menu (the button with the 3 lines) and press 'Close Game/App' at the bottom (the cross).