Rfk last boss no roll

Was doing an rfk and we had group loot. Boss went down.

When i went to loot the corpse the ring showed as a drop. Instead of letting us all roll tho it gave it to a shaman in the group.

I dont NEED the ring, but is anyone else experiencing anything like this?

#1 is it unique and do you already have it
#2 did sham change it to master loot right before boss died?

I can get behind it being unique. But noone else rolled. Not even the shaman. Still set to group (i was lead).

If it was “my loot” before roll would it possibly register as unique and then revert to ffa loot like it does when you decide to not loot an item?