Spin into Myth vanish the fatesealed cards

Describe the Bug:
AI cast Spin into Myth and targeted my Shah of Nalaar Isle.Then fatesealed 2 and both the Shah of Nalaar Isle and the Mesmeric Sliver which where on top of my library vanished from game.If I am not wrong this happens only if AI decides to put the card/cards on bottom of library.
Which card did behave improperly?
Spin into Myth
Which update are you using? (date, name)Which type? (duel, gauntlet, sealed deck)
Manalink dev 778ccb5 version - duel
What exactly should be the correct behavior/interaction?
Are any other cards possibly affected by this bug?
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AI cast Spin into Myth and targeted my Shah of Nalaar Isle.Then fatesealed 2 and both the Shah of Nalaar Isle and the Mesmeric Sliver which where on top of my library vanished from game.If I am not wrong this happens only if AI decides to put the card/cards on bottom of library.
Which card did behave improperly?
Spin into Myth
Which update are you using? (date, name)Which type? (duel, gauntlet, sealed deck)
Manalink dev 778ccb5 version - duel
What exactly should be the correct behavior/interaction?
Are any other cards possibly affected by this bug?
-