Constant Active Profile Signed Out messages on MCC

On Wednesday afternoon I went to play Firefight on my 2 week old Series X and got a message that the unit couldn't find the Teledo IP port. I looked online for solutions but was unable to fix it so I eventually just powered off the unit. Thursday morning everything worked OK. I was able to play Firefight and PVP without a problem. Around 4:30 PM I went to play a match and the above message showed up. It is now constant and only happens with MCC. I start the game, go to the main menu and within 30 seconds it kicks me back to the title screen. I've gone through all of the steps I can find to cure the problem, i.e. resetting to factory settings, deleted and reinstalled game, deleted and reinstalled account but nothing works. I went today and got a new router which didn't fix the issue. I've tried wireless as well as different ethernet cables. As much as I don't want to I'm beginning to believe it's the Series X. There have been a few oddities with it in addition to the problem noted. I'm unable to delete Achievement notifications. I delete them and a while later they show back up. I've got automatic sign in turned on and intermittently I will start it up and come back and it's waiting for me to select the account I want to sign in. Any help would be greatly appreciated.