Hi there today i joined LFR system as DK tank to kill the first three bosses,
First we killed the stone guard bosses, i was lucky and i won the waist item ""Star-stealer waist guard"" for tank.
Then i tried also to use my elder charm of good fortune coin. The roll give me exactly the same waist tank item again. I dont know how the systems work but ok no time to discuss about this so we moved to the second boss Feng the Accursed after we killed the boss i won an tank item again this time the bracers ""Bracers of six Oxen"" so i spend this also a coin for a second roll and gues what i get the same wrist tank item again.
I have now twice a duplicated item with using a Elder charm of good fortune coin. I know there is a litlle chance to get an item with using a coin but getting twice the same items i already won is really useless.
I hope blizzard can fix this or at least that is not possible to win an item that you already won on that roll from boss in a LFR when using a Coin.
ps. Sorry for my language, English is not my best side to write