`addDelegateDirective` always trigger delegation logic when there's a single slot and value is passed for this slot.

I have an intent with one slot personName

{
                    "name": "GetTasksForPerson",
                    "delegationStrategy": "ALWAYS",
                    "confirmationRequired": false,
                    "prompts": {},
                    "slots": [
                        {
                            "name": "personName",
                            "type": "AMAZON.FirstName",
                            "confirmationRequired": false,
                            "elicitationRequired": true,
                            "prompts": {
                                "elicitation": "Elicit.Slot.545366327695.363893439591"
                            }
                        }
                    ]
                }

and when I add delegation to this intent:

responseBuilder.addDelegateDirective({
                name: 'GetTasksForPerson',
                confirmationStatus: 'NONE',
                slots: {
                    personName: {
                        name: 'personName',
                        confirmationStatus: "NONE",
                        value: 'Maksym',
                    }
                }
            });

then Alexa thinks that slot isn't passed and it's waiting for the user to say personName

But if I add another slot to this intent then delegation starts working and slot value is passed.