If you speak to Yulia in Soreth’Ka, then disconnect before completing the part of the quest “Speak with Soreth’Ka Nagasa,” when you log back in and attempt to complete that section of the quest, it does not update. You can click through the quest dialogue, but the quest marker does not update, and you are unable to complete the next section of the campaign.
I’ve tried just going to the next area, disconnecting and reconnecting, accessing Soreth’Ka through the boat in Thetima, none of that fixes the quest. It’s literally impossible to progress through the campaign.