My understanding of how duplicate protection for rares in ICRs works is that if you would receive a rare you already have a playset of, you instead receive a different rare from the same set if you do not have all the rares from that set, or 20 gems if you do. I do not have all the rares from Edge of Eternities, but twice now ICRs have given me 20 gems when awarding a card I have a playset of instead of a different rare. One of these times it displayed a single reward of 20 gems incorrectly saying I had all the rares in the set, and the other it displayed 2 rewards: 20 gems along with a specific rare I already had 4 of. This is not the biggest issue but it struck me as odd.