Issue checking ModalResult in Multiform demo

In the multiform demo, the modal form of type TForm2 is called using

TAwait.ExecP<TModalResult>(newform.Execute);

If I set TForm2 button's ModalResult to mrOk, I would expect that I can check the ModalResult this way:

if TAwait.ExecP<TModalResult>(newform.Execute) = mrOk then

But this doesn't work. I have to do

    TAwait.ExecP<TModalResult>(newform.Execute);
    if newform.ModalResult = mrOk then

I cannot reproduce this.
Test:

    // excute form and wait for close
    if TAwait.ExecP<TModalResult>(newform.Execute) = mrOK then
      console.log('ok')
    else
      console.log('cancel');

with in the launched form:

procedure TForm2.WebButton1Click(Sender: TObject);
begin
  ModalResult := mrCancel;
end;

procedure TForm2.WebButton2Click(Sender: TObject);
begin
  ModalResult := mrOK;
end;

it returns the proper modal result value depending on the button clicked.

I set TForm2.WebButton2's ModalResult property in Object Inspector to mrOk
and left TForm2.WebButton2Click as it was

procedure TForm2.WebButton2Click(Sender: TObject);
begin
  Close;
end;

Remove the Close call in that case as setting ModalResult for the button already causes the form to close

Ok, thank you.