android - RecyclerView item transition to DetailsFragment

I am trying to create transition from single RecyclerView
item to new DetailsFragment.
This is my
situation:

Layout
hierarchy:

 (Lvl1) MainActivity
            (fragment_container)
 (Lvl2) HomeFragment
 (Lvl3)
            ViewPager
 (Lvl4) AnotherFragment
 (Lvl5) RecyclerView

            (Lvl6) CardView (transitionName="item")
 (Lvl2) DetailsFragment

            (Lvl3) RelativeLayout
            (transitionName="item")

So,
when item inside RecyclerView is clicked, fragmentTransaction will replace HomeFragment
with DetailsFragment and what i want to achieve is "changeBounds" from CardView to
RelativeLayout while HomeFragment is fadingOut and DetailsFragment in
fadingIn.

My solution can be seen below and
problem that i have is that DetailsFragment is instantly shown in background on
transaction commit. Clicked CardView remains visible (above DetailsFragment) and it is
fading as it should, but without any changes in dimension or position. All other
CardViews are invisible during this
operation.

It is obvious that i do not
undesrstand something here and it is not working as it
should...

activity_main.xml

            android:id="@+id/fragmentContainer"

            android:layout_width="match_parent"

            android:layout_height="match_parent">

MainActivity.java
->
OnRecyclerViewItemClick

@Override
public
            void onRecyclerViewClick(int position, int key) {
 if (Build.VERSION.SDK_INT
            >= Build.VERSION_CODES.LOLLIPOP) {

 Fade fadeOutTransition = new
            Fade(Fade.OUT);
 fadeOutTransition.setDuration(2000);
 Fade
            fadeInTransition = new Fade(Fade.IN);

            fadeInTransition.setStartDelay(2000);

            fadeInTransition.setDuration(10000);

 ChangeBounds
            changeBoundsTransition = new ChangeBounds();

            changeBoundsTransition.setDuration(10000);


            homeFragment.setSharedElementEnterTransition(changeBoundsTransition);

            homeFragment.setReenterTransition(fadeInTransition);

            homeFragment.setExitTransition(fadeOutTransition);


            frag.setEnterTransition(fadeInTransition);

            frag.setAllowEnterTransitionOverlap(false);

            frag.setAllowReturnTransitionOverlap(false);

            frag.setSharedElementEnterTransition(changeBoundsTransition); 


            ViewPager pager =
            (ViewPager)((FrameLayout)homeFragment.getView()).getChildAt(0);

            RelativeLayout pagerLayout = (RelativeLayout) pager.getChildAt(0);

            RecyclerView recycler = (RecyclerView)pagerLayout.getChildAt(0);


            View view = recycler.getChildAt(position); 


            getSupportFragmentManager().beginTransaction()

            .replace(R.id.fragmentContainer, frag)
 .addToBackStack(null)

            .addSharedElement(view , "item")

            .commit();