So, this didn’t only happen to me, it happened to a very large number of people.
I am from Jade Quarry, and we are matched up against Crystal Desert and Stormbluff right now. Just after the maintenance at midnight September 5th, a few hours ago, I went to the Eternal Battlegrounds.
Our entire team, myself included, spawned on a mountain in the northwest. We were confused, we made our way down and soon realized via chat and interaction, we were friendly and speaking to Crystal Desert and Stormbluff. How strange, so we run around and we all meet and we can’t fight each other. We kill a grub, and then all of the sudden I notice fighting, but the people that are fighting, are Maguuma invaders and Sorrows Furnace invaders.
I was also able to revive Maguuma Invaders and Sorrows Furnace invaders, it felt like they could not see us and I know they could not hear us. It was like being in an alternate dimension.
It was after reviving a few maguuma guys that I realized they were maguuma guys, and then I left because upon that realization it was very clear to me that this was unfair.
Essentially, Jade Quarry, Stormbluff, and Crystal Desert were ghostly spirits in the Maguuma and Sorrows Furnace matchup, that could revive either side. There is still probably a few people there, so someone might want to investigate that.