We've addressed some issues teams were having running missions together in Star Clusters. We have fixed a few cases where teams would not be able to load into the map together. See known issues for more status.
We continue to investigate issues of teams not being able to load into Star Cluster maps together. We have fixed one issue related to this but believe that it will only work for "new" star cluster missions. Trying to continue a previous star cluster mission, where only one team member had the mission to begin with is still problematic.
this still is completely broken. fresh group, no existing patrol missions and none of us in the group could get into the same instance or even the same mission type even after clicking the mission window in sector space after one of the team members has accepted the mission.