Quest Issue: Simultaneous hand ins and item loss

[Hakurou]

I think a lot of people are already aware of the Shimmering Pearls that went missing on Ragefire. Today this also happened while turning in two Lord Grimblox’s Signet Rings at about the same time to Natasha Whitewater in Timorous Deep, resulting in exp and quest response to be given to only one person and the other losing the ring.

This leads me to believe that quest hand ins in general are to some extent broke, resulting in disappearing quest items and lots of headache if handed in at about the same time. Maybe there's nothing that can be done about it, if so there should at least be a warning in a prominent place so people can be aware of it.