state.index goes off the rail, internally inconsistent with state.offset.x

I've written the following for debugging and attempt at correction. I observed that during quick swiping horizontally through my 10 horizontal child Scrollviews under react-native-swiper during heavy cpu use (rendering in said child Scrollviews), oftentimes index would go off the rails and be wrong.

My debugging code:

const onMomentumScrollEnd = (e, state, context) => {
  let index = Math.round(state.index)
  let offsetIndex = Math.round(state.offset.x / Dimensions.get('window').width - 1)
  if (index != offsetIndex) {
    console.log(`>>> Swiper.onMomentumScrollEnd offsetIndex ${offsetIndex} doesn't agree with index ${index}:`, state, context)
    index = offsetIndex
  }
}

index, when wrong, would always be smaller than it should be. offsetIndex would always be correct, corresponding to the correct Scrollview with data displayed within for that actual index.

This is obviously a problem as a wrong index loses the correct placement of child Scrollviews, and wrong display of the pager dots.

Start at the onMomentumScrollEnd callback and trace how state.index and state.offset.x are updated during rapid horizontal swipes, especially with heavily rendering child ScrollViews. Reproduce the mismatch under heavy CPU use and verify that the index, displayed child ScrollView, and pager dots remain aligned with the offset.