I ran into an event that had spawned on the Crystal Desert map in the western Fields of Ruin. It prompted me to collect corrupted ore near the Charr mines there. I had obviously gotten to the area well after the event had started, as it warned me there was only one miner left alive. I raced there, and…no miners anywhere. None on the ground to res, none alive to be seen (even though 1 was still indicated on the event info as being alive). There was no orr to be collected, not even by killing the branded minions inside the event area.
Seemed to me that the event has stalled and bugged out. Just thought it was worth a mention.