Line "do emit(signal)" seems to stop dialogue forever

[robertilintilin]

Hello!

Im modifying the example dialogue from the youtube video to emit a signal and display a battle screen:

~ start

Nathan: [[Hi|Hello|Howdy]], this is some dialogue.
Nathan: Here are some choices.

• First one
  Nathan: You picked the first one.
• Second one
  Nathan: You picked the second one.
• Start again => start
• End the conversation => END
  Nathan: For more information see the online documentation.
  do emit(WorldTime.battle_started)
  Nathan: Howdy
  => END

My problem is than the dialogue seems to be "frozen" trying to emit the signal. The dialogue balloon disappears, the game doesn't get any input and Nathan never says the last line.
The dialogue keeps going when i write "do! emit(WorldTime.battle_started)" instead, but the signal never gets emmited.

Thank you very much for your help!

[robertilintilin]

do WorldTime.battle_started.emit() Works