Slot bool type default value

Hi!

Is it possible to define bool slot with default value? For some reason, if I use the code below, my slot does not change during custom action. After I return slot by the following expression in custom action - return [SlotSet(“initial_value”, False)], my slot is still the same True value…

first_time_greet:

influence_conversation: true

type: bool

initial_value: True

mappings:

- type: custom