Can't get data out of a ListBlock of StreamBlocks

[Scotchester]

We are trying to access a ListBlock of StreamBlocks, and no matter how we try to query it, we can't get any data out of the StreamBlocks.

I don't have time to produce a reduced example today, but I wanted to go ahead and get this open to see if anyone else has experienced this. I suspected it might have something to do with this method only seeming to support a ListBlock of StructBlocks:

wagtail-grapple/grapple/types/streamfield.py

Lines 402 to 406 in 0d20a8c

	def resolve_items(self, info, **kwargs):
	# Get the nested StreamBlock type
	block_type = self.block.child_block
	# Return a list of GraphQL types from the list of values
	return [StructBlockItem(self.id, block_type, item) for item in self.value]

but absolutely nothing I change in that method alters the behavior of GraphQL. In fact, I can empty out the entire class and put in a dummy Graphene property, and the basic ListBlock of ButtonBlocks example from the docs still works fine!

class ListBlock(graphene.ObjectType):
    whatishappening = graphene.String()
    # items = graphene.List(graphene.NonNull(StreamFieldInterface), required=True)

    # class Meta:
        # interfaces = (StreamFieldInterface,)

    # def resolve_items(self, info, **kwargs):
        # Get the nested StreamBlock type
        # block_type = self.block.child_block
        # Return a list of GraphQL types from the list of values
        # return [StructBlockItem(self.id, block_type, item) for item in self.value]

So, I am very confused about what is going on there.