'Get Started' button appears when orientation is changed on last slide

[TheDorkKnightRises]

In my simple implementation of the material intro, whenever the orientation of the device is changed while on the last slide, the CTA button ('Get Started') is shown. It disappears on moving to any other slide, but inevitably returns if the orientation is changed on the final slide. Tapping the button has no effect.
Here is a screenrecord: Link

Might be linked to issue #63

Here is my code:

@Override
protected void onCreate(Bundle savedInstanceState){

    super.onCreate(savedInstanceState);

    /* Enable/disable skip button */
    setButtonBackVisible(true);
    setButtonBackFunction(BUTTON_BACK_FUNCTION_SKIP);

    /* Enable/disable finish button */
    setButtonNextVisible(true);
    setButtonNextFunction(BUTTON_NEXT_FUNCTION_NEXT_FINISH);

    addSlide(new SimpleSlide.Builder()
            .title(R.string.app_name)
            .description(R.string.intro1)
            .image(R.drawable.ic_launcher)
            .background(R.color.background)
            .backgroundDark(R.color.background_dark)
            .build());

    addSlide(new SimpleSlide.Builder()
            .title(R.string.sorting)
            .description(R.string.intro2)
            .image(R.drawable.ic_launcher)
            .background(R.color.background)
            .backgroundDark(R.color.background_dark)
            .build());

    addSlide(new SimpleSlide.Builder()
            .title(R.string.details)
            .description(R.string.intro3)
            .image(R.drawable.ic_launcher)
            .background(R.color.background)
            .backgroundDark(R.color.background_dark)
            .build());

    addSlide(new SimpleSlide.Builder()
            .title(R.string.details)
            .description(R.string.intro4)
            .image(R.drawable.ic_launcher)
            .background(R.color.background)
            .backgroundDark(R.color.background_dark)
            .build());

    addSlide(new SimpleSlide.Builder()
            .title(R.string.fav)
            .description(R.string.intro5)
            .image(R.drawable.ic_launcher)
            .background(R.color.background)
            .backgroundDark(R.color.background_dark)
            .build());
}