Collectible Card Game Headquarters

Describe the Bug:
All the cards with convoke aren't working well.
Some of them like Sprout Swarm won't hardcast with mana and 0 creatures on the table, click on the card, pay the costs and the card returns to hand with nothing happening. This won't happen if the board has 1 creature and use convoke with at least one creature.
Triplicate Spirits isn't triggering the Convoke even with a board filled with creatures it still don't trigger anything at all, neither hardcast mana or Convoke.

Which card did behave improperly ?
Triplicate Spirits and several other cards with Convoke like Sprout Swarm

Which update are you using?(date,name)Which type(Duel,Gauntlet,Sealed Deck)
the latest one from December 2015; Duel

What exactly should be the correct behavior/interaction ?
Convoke cards should have the option to be mana hardcasted and also triggered by its Convoke factor due to creatures on the table.

Are any other cards possibly affected by this bug ?
All the cards with Convoke

I am using this post as it seems the best suited with the most bugged interactions of convoke mechanism correctly mentioned that still are true and the post is not confusing with many answers to it:

Casting cards with convoke mechanism (tested with Stoke the Flames and Feral Incarnation) intentionally not testing cards with X perplexing things even more:

1- If you don't have a creature on the battlefield or you have only tapped creatures you can't hardcast convoke spells.Either you pay the mana and mana and spell get rejected = (manual tapping) or you can't even pay mana although they highlight as castable = (double-click=auto pay).

2a- If there is at least an untapped creature on the battlefield then menu with all options opens but if you select play normally mana will be again rejected to pool and spell to hand.

2b- If there is at least an untapped creature on the battlefield then menu with all options opens if you select to use convoke and then when you are prompt to "select creatures to tap for convoke" you cancel then the spell gets played normally = hardcast

2c- = Working fine If there is at least an untapped creature on the battlefield then menu with all options opens and if you select to use convoke ,then prompt to tap the creatures and spell correctly resolves.

Please another bughunter to check this also.

All issues confirmed with Stoke the Flames

All fixed (and briefly tested) in 305564f