Bug with Velen, Leader of the Exiled

I am using this deck ### Custom Death Knight2

Class: Death Knight

Format: Wild

2x (1) Astral Vigilant

1x (1) Starlight Wanderer

2x (2) Astrobiologist

1x (2) Mosh Pit

2x (3) Chillfallen Baron

1x (3) Crimson Commander

2x (3) Frozen Shadoweaver

1x (3) Graveyard Shift

2x (3) Nightmare Amalgam

1x (3) Prosthetic Hand

2x (3) Rambunctious Stuffy

2x (4) Circus Amalgam

2x (4) Cool Ghoul

2x (4) Saronite Chain Gang

1x (4) Thassarian

1x (5) Ace Wayfinder

2x (5) Guild Recruiter

2x (5) Possessifier

1x (7) Velen, Leader of the Exiled

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to clear up the summon reborn minions and summon draenei quests with one deck, when the deathrattles finish triggering for Velen, his animation remains active and I have to close the game and reenter the game to get back to being able to do stuff.