Usually its just junk that nobody wants anyway, but there have been stories of final coil groups accidentally throwing away valuable items too.

Its sometimes because the person who was meant to get the loot, rolls for it, but then absentmindedly leaves the instance before everyone else has rolled.

I think there are 2 things that could be done to help:

- If you have rolled on an item, when you try to exit the instance a warning message should pop up to say "You have rolled on an item that is still being lotted on, are you sure you want to leave?" or words to that effect.

- Give the last person to pass an item a warning message, something along the lines of; "nobody else has rolled for this, so the item will be discarded, are you sure?"