Android ViewPager with RecyclerView works incorrectly inside BottomSheet

Question

When I try to scroll list, sometimes this works incorrect - BottomSheet intercepts the scroll event and hides.

How to reproduce this:

1. Open Bottom Sheet

Answer 1

Looks like all that's required is updating nestedScrollingChildRef appropriately.

Simply setting it to the target parameter in onStartNestedScroll is working for me:

package com.google.android.material.bottomsheet

class ViewPagerBottomSheetBehavior(context: Context, attrs: AttributeSet?) : BottomSheetBehavior(context, attrs) {

    override fun onStartNestedScroll(coordinatorLayout: CoordinatorLayout, child: V, directTargetChild: View, target: View, axes: Int, type: Int): Boolean {
        nestedScrollingChildRef = WeakReference(target)
        return super.onStartNestedScroll(coordinatorLayout, child, directTargetChild, target, axes, type)
    }
}