Need help with NestedScrollView

[pacifire]

I am trying to use the "TopSheetBehavior" with NestedScrollView.

if i replace NestedScrollView with LinearLayout, everything work fine. But if i use NestedScrollView, the "FrameLayout (i.e. top Sheet)" cannot be collapsed.

Just more understanding:
I have NestedScrollView
|
|----->NestedScrollView has TabLayout.
|
|------> Tablayout has Fragment
|
|------> Fragment has this "Top Sheet"

Could you please help... :-)