Request: Raiding Chest Lock Party Finder Option

[RobinMalvin]

In case someone in party has cleared for the week, the game will also warn you once you enter the instance with message like "<insert number> of 8 have completed the duty. The amount of coffer dropped will reduce to one (or zero if 4 or above have cleared)".

I'm sorry for your loss but if you and the others with you ignored or failed to notice such warning from the game itself, the fault is entirely yours.