Have trouble with using normal scroll sections before auto scrolling sections.

[MasterDev333]

Hi, thanks for creating such a great plugin.
I really love to use this but I have trouble with using normalScrollElements.

As you can see, above screenshot first section has scrollable-content and it has 3 subsections.

Here's my javascript code for Fullpage

new fullpage("#fullpage", {
      licenseKey: 'xxx',
      navigation: false,
      scrollBar: true,
      scrollingSpeed: 1000,
      scrollOverflow: true,
      sectionSelector: 'section',
      normalScrollElements: '.scrollable-content',
      credits: false,
      responsiveWidth: 800
    });

I tried to made normal scrolling elements from this example. https://codepen.io/alvarotrigo/pen/RmVazM

[alvarotrigo]

So what's the problem?
Can you please provide a codepen where we can reproduce the issue for further investigation?