OnItemTouchListener blocking MotionEvent from RecyclerViews' parent if RecyclerView can scroll left or right

medium_horizontal_recyclerview_in_viewpager.kt

addOnItemTouchListener(
    object : RecyclerView.OnItemTouchListener {
        private var startX = 0f

        override fun onInterceptTouchEvent(
            recyclerView: RecyclerView,
            event: MotionEvent
        ): Boolean =
            when (event.action) {
                MotionEvent.ACTION_DOWN -> { startX = event.x }
                MotionEvent.ACTION_MOVE -> {
                    val isScrollingRight = event.x < startX
                    val scrollItemsToRight = isScrollingRight && recyclerView.canScrollRight
                    val scrollItemsToLeft = !isScrollingRight && recyclerView.canScrollLeft
                    val disallowIntercept = scrollItemsToRight || scrollItemsToLeft
                    recyclerView.parent.requestDisallowInterceptTouchEvent(disallowIntercept)
                }
                MotionEvent.ACTION_UP -> { startX = 0f }
                else -> Unit
            }.let { false }

        override fun onTouchEvent(rv: RecyclerView, e: MotionEvent) = Unit
        override fun onRequestDisallowInterceptTouchEvent(disallowIntercept: Boolean) = Unit
    }
)

private val RecyclerView.canScrollRight: Boolean
    get() = canScrollHorizontally(SCROLL_DIRECTION_RIGHT)

private val RecyclerView.canScrollLeft: Boolean
    get() = canScrollHorizontally(SCROLL_DIRECTION_LEFT)

private const val SCROLL_DIRECTION_RIGHT = 1
private const val SCROLL_DIRECTION_LEFT = -1