Recyclerview inside Nested Scrollview scroll but does not fast scroll like normal Recyclerview or Nested Scrollview
try
recyclerView.setNestedScrollingEnabled(false);
By default setNestedScrollingEnabled works only after API-21.
You can use ViewCompat.setNestedScrollingEnabled(recyclerView, false); to disable nested scrolling for before and after API-21(Lollipop). Link to documentation.
I was working on android 16 where this was not possible to use setNestedSCrollEnabled method,
What I end up doing to stop RecyclerView from handling Scrolls.
Like in LinerLayoutManager i made canScrollHorizontally, canScrollVertically to return false by default.
myRecyclerView.setLayoutManager(new LinearLayoutManager(getContext(), LinearLayoutManager.VERTICAL, false){ @Override public boolean canScrollHorizontally() { return false; } @Override public boolean canScrollVertically() { return false; } });