Xbox party Issue with Warframe

We were having this issue last night. Multiple people had multiple issues joining the party / joining the game.

1) I was in GTAV, they were in Warframe. Could not "join party" via friends app.

2) Left GTAV, same.

3) Restarted console, was able to join party.

4) Started Warframe, could not join game either by accepting invite or via party app. Both times, clicking the button did nothing.

5) Everyone quits Warframe, restarts, able to join game.

6) One player crashes out mid-game, could not rejoin via party app or invite.

7) That player restarts console, back to normal.

We've been having weird connectivity issues it seems ever since the holiday rush.

The graphics in Warframe are nice, but I did notice some frame rate issues when the fights become dense, especially with a party.

Online Warframe... LAN parties, Halo all day

Look like a more expensive version of Warframe....

And quite happy that Microsoft didn't spend ressources for this 3rd party game.

Please make sure the both of you have the ports opened in your router as described in this link:

https://support.xbox.com/xbox-one/networking/network-ports-used-xbox-live

Already done. We did find a workaround for most of the games. The workaround was to use Google DNS servers for both parties instead of our ISP's. The only one giving us issues now is Warframe. I have no idea what is causing it to
have issues when all the other games work fine. The specific error we get on Warframe when connecting to each other for a mission or squad is "Failed to join session (host unreachable)" Any other suggestions?