Even worse…if you happen to try the quest right after maintenance, there is only one ghost…killed it no problem BUT, the next part of the quest “kill marooned pirates” is also bugged…there are no marooned pirates to kill. So, even if you get lucky and kill the ghost before they pile up 10-20 of them, you can’t finish next part either!
The really awesome part is that 2 quests later in the chain, you get the same bug in a different location.
Still bugged on Pulotu EU-Central. Unable to do it even on a 10 man run.
Paths Unseen is also bugged out on US-East Olympus. Activated the rocks, killed the mobs that spawned… and then nothing happened. No completion, no nothing.
Having the same issue on US-East Chicomoztoc
Still bugged (even after 1.0.5). Niflheim, EU.
Can confirm, this is still bugged. Attempting to do this quest now and I cannot as there are 7 ghosts for me to try to kill.
bump, still happening. There were 12 of the elites that spawn for me today 
Still happening on Ydalir - 25+ Ghosts
BUMP Fix this please can;t complete quest
after a month and no fix of the quest “Paths Unseen”
Yggdrasil here, looks like 2 ghosts, attacked them, died in about 2 sec as a tank with 13k hp because the 2 became about 10 each.
This is also happening on EU Central Alfheim. About 20 or so enemies stacked on top of each other
Same happening in EU Central Heracleion, unplayable.
still bugged /sadpanda
EU: Muspelheim
Since bugged on Rauch. How is this not on the Known Issue list? Apparently you will need this for the void gauntlet quest so you better patch this when it comes out
Still bugged. Piles of ghost here, which insta-kill you.
Bump. Would love to progress the story.
Still same issue, i mean more than one month and no fix for this bug…
Wachusett
Still the same, are you even doing anything?