[confirmed]Wild Evocation+Fireball allows paying mana

[Korath]

Describe the Bug:
If the card revealed by Wild Evocation is Fireball, you get prompted to pay mana for X.

Which card behaved improperly?
Wild Evocation.

Which update are you using? (date, name)Which type? (duel, gauntlet, sealed deck)
Dev e9d990e.

What exactly should be the correct behavior/interaction?
You reveal exactly one card, and only cast or put exactly that one card on the battlefield.

Are any other cards possibly affected by this bug?
All of the other X-cost spells that charge mana by themselves and tell the engine that they aren't X. As of this writing, that's Biomass Mutation, Curse of the Swine, Distorting Wake, Dwarven Catapult, Firecat Blitz, Gridlock, Hooded Hydra, Icy Blast, Immortal Servitude, Logic Knot, Malicious Advice, Return to the Ranks, Rolling Thunder, Shattered Crypt, Thrive, Volcanic Eruption, Word of Binding, and Winter Blast. (There are fewer in release, but I don't remember which are new.) Also Spell Blast, which charges the mana itself too, but at least doesn't claim it's not an X spell.

[Aswan jaguar]

In public version I confirm the Fireball bug.
In public version I don't confirm the Firecat Blitz bug.
Not testing the rest as it is obvious to devs.