How to pass self-reference to UButton's OnClicked delegate (UMG)?

[WHSolv]

I’ve tried to create a custom OnClicked delegate for custom Button (inherited from UButton), that passes self-reference, but it is not exectued when I click a button.

Header:

DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam(FOnButtonClickedRefDelegate, UExtendedButton*, ButtonRef);
    UCLASS()
    class DQS_API UExtendedButton : public UButton
    {
    	GENERATED_UCLASS_BODY()
    	
    public:
    	UExtendedButton();
    
    	/** Should be called when the button is clicked, also gives the reference to this... */
    	UPROPERTY(BlueprintAssignable, Category = "Button|Event")
    	FOnButtonClickedRefDelegate OnClickedReferenced;
    
    	UFUNCTION()
    	void OnSelfClicked();
    
    	UFUNCTION()
    	void DoSomething(UExtendedButton* ButtonRef);
    
    protected:
    	/** Handle the actual click event from slate and forward it on */
    	FReply SlateHandleClicked();
    
    };

Source:

UExtendedButton::UExtendedButton(const FObjectInitializer& ObjectInitializer)
	: Super(ObjectInitializer)
{
	OnClickedReferenced.AddDynamic(this, &UExtendedButton::DoSomething);
	OnClicked.AddDynamic(this, &UExtendedButton::OnSelfClicked);

	
}

void UExtendedButton::OnSelfClicked()
{
	if (GEngine)
		GEngine->AddOnScreenDebugMessage(-1, 5.f, FColor::Red, 
			FString("Hello :: ").Append(this->ButtonText->GetText().ToString())
		);

	OnClickedReferenced.Broadcast(this);
}
void UExtendedButton::DoSomething(UExtendedButton* ButtonRef)
{
	OnClickedReferenced.Broadcast(ButtonRef);

	if (GEngine)
		GEngine->AddOnScreenDebugMessage(-1, 5.f, FColor::Red,
			FString("Do :: ").Append(ButtonRef->ButtonText->GetText().ToString())
		);
}

/* Cannot be overwritten since the original one isn't virtual... */
FReply UExtendedButton::SlateHandleClicked()
{
	OnClickedReferenced.Broadcast(this);

	return FReply::Handled();
}

I couldn’t set things right as in [here][1], since I didn’t expect to touch Slate at all, only UMG.
What I want to achieve is this BP working: