ViewPagerAdapter.java

...
    @Override
    public void setPrimaryItem(@NonNull ViewGroup container, int position, @NonNull Object object) {
        super.setPrimaryItem(container, position, object);
        NestedScrollView current = ((NestedScrollView)object);
        current.setNestedScrollingEnabled(true);

        for (int i = 0; i < getCount(); i++) {
            if (i != position) {
                NestedScrollView otherScrollView = container.findViewWithTag(i);
                otherScrollView.setNestedScrollingEnabled(false);
            }
        }

        container.requestLayout();
    }
...