There's a bug in the Valus Strike on Mercury. My strike team killed him three times and received loot all three times. The first two never registered his death so we wiped to try and fix it. Of course the strike finally completed and we were sent back to the overworld.
I'm not so mad as I was rewarded for every death the boss had. My concern is this wasn't the way the strike was meant to be.... has anyone else had this happen to them??