Well, first of all excuse me if my English is not good enough. Secondly, 2 days ago I tried to complete the ghost ship boss, and failed, and now the game says I already claimed the reward, which is completely false. I went looking for information about this and found out that many people had the same thing happen, and in the same game update notes it says that this should NOT happen.
Players can check for 4 types of content through Procyon’s Compass (the widget that displays active content), or by accessing the Calendar in the top-left of the HUD for the full schedule. Activity times are based on the local time of the server’s region.
If you drop out or leave the area while participating in these activities, the reward counter will not increment and you will have another chance to earn a reward.