Undoing the sacrifice cost of an emerge ability behaves incorrectly

[datrobino]

What is the expected behaviour of the card?

• You can sacrifice one creature to emerge, reducing that spell's cost by that creature's mana value

What is the actual behaviour of the card?

• When casting a spell with emerge, you can undo the sacrifice. That causes the spell's cost to be reduced by the creature's mana value, but lets you sacrifice a creature again to reduce the cost further. Creatures sacrificed in this way won't trigger their death triggers or leaves the battlefield triggers.

Screenshot

Please provide a list of affected cards Affects: [Abundant Maw], [Distended Mindbender], [Drownyard Behemoth], [Elder Deep-Fiend], [It of the Horrid Swarm], [Lashweed Lurker], [Mockery of Nature], [Vexing Scuttler], [Wretched Gryff], [Decimator of the Provinces]

Card Images

[Wizzerinus]

The abilities that would trigger when the sacrificed creature leaves play (Fiend Hunter) don't trigger either. The timed abilities (Kitesail Freebooter) work correctly.