Party Notifications consistently popping up during COD AW

This is a game problem. As far as I can see Activision and Sledgehammer are aware of it. It should be patched soon.

You can turn notifications off completely and that should keep beacons from popping up. Then just pop open the guide after an online match or during a slow period to check for messages or who is online. They need to fix part of notification options as well
since it blocks achievements notifications from popping up.

I'm talking about notification whilst playing games, like when someone signs in and you see their online, if I'm playing a game whilst in an XBL party and someone in the party goes away it would be good when they change their status to away or busy a notification
pops up for me and the others in the party, like wise for me if I go away to do something I just change my status and a notification pops up for the others in the party.

Hi! See this link in order to find out how to perform a power cycle/hard reset: https://support.xbox.com/en-US/xbox-one/console/power-cycle-console

Besides that, make also sure to set the duration of notification popups.

Try performing a hard reset EXACTLY like this.

Hold the power button on the console for 8 seconds or until the power shuts down completely. Unplug the power cord from the back of the console for 5 minutes. Plug the power cord back in and restart the console.