Collectible Card Game Headquarters

Describe the Bug:
Mycosynth Wellspring's ETB ability and death trigger will always prompt the card selection/library viewer popup. Hence, the library is always shuffled, even if an invalid card or no card at all is chosen.

Which card did behave improperly ?
Mycosynth Wellspring

Which update are you using?(date,name)Which type(Duel,Gauntlet,Sealed Deck)
JOU, duel

What exactly should be the correct behavior/interaction ?
The fetch is optional.

Are any other cards possibly affected by this bug ?
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Fixed in a2da8b4

Still brings up search box on cast without asking for trigger. But going to gy uses trigger correctly.

Fixed in d9ce25b