Today I tried to open the chests. I have full of keys, and never used, so this was the day, I when I want to get the gear and the points for the master diver. I did 10/10 opened all, got the stuff, but in Iron Marches, at the Spentlung Depth, didn't got the point, just the stuff. And of corse I tried to do it again, but the chest still opened, so can't repeat. Try in other time?