End of Season Reward Multiplesof the same card

[Rhasimir-1573]

This will be fixed for the end of May rewards:

Duplicate Cards in Season Rewards Chest

Hey everyone, We’ve seen reports of players receiving duplicate cards from their April Rewards Chest. We’ve investigated this and determined that duplicate protection was not applied to individual cards in chest rewards, just packs. For the May Rewards Chest, we will be implementing an improvement that does the duplicate check on the chest level, which will result in all chest rewards being covered by the new protection rules.