[confirmed]Dack Fayden emblem + heroic

[Nexhro]

Describe the Bug:
Don't know if this is even solvable.

When a player has Dack Fayden 's emblem and targets a creature with heroic controlled by the opponent, that creature's heroic ability triggers.

Which card did behave improperly ?
Dack Fayden or creatures with heroic

Which update are you using?(date,name)Which type(Duel,Gauntlet,Sealed Deck)
JOU v1, duel

What exactly should be the correct behavior/interaction ?
When a player has Dack Fayden 's emblem and targets a creature with heroic controlled by the opponent, that creature's heroic ability doesn't trigger.
(By the time the target for the spell is determined, said target is still controlled by the opponent.)

Are any other cards possibly affected by this bug ?
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