Gamertag Blocked?

I'm having issues connecting with friends ONLY with a particular gamertag. I can't party up, chat, or join sessions in progress with a few of my friends using my main gamertag. Yet, when I switch over to another gamertag I can connect and party up with the same friends on the same Xbox. My NAT has always been open as so are all my friends. Can anyone tell me why this is happening?
 

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Last updated July 4, 2018 Views 2 Applies to:

Your private and safety settings may have change, check this so you can see if that is the problem: support.xbox.com/.../online-safety

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Have you tried submitting a player review and then clicking prefer player? If you hit the Xbox guide button, go to friends, and then choose the person you want you can easily prefer them. You could have accidentally avoided the player causing it to block all communications and party capabilities. A friend of mine accidentally did that with me a while back.  Prefering the player fixed the problem. It's worth a try. I hope this helps.

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