Viewpager2 scroll stops working when scrolling back

Question

I am facing a weird issue, I have a Viewpager2, the fragment page contains a Scrollview, HorizontalScrollView, and a RecyclerView.

When I launch the fragment that hosts the ViewPager the UI works, it also works if I swipe right, but as soon as I swipe left to the previous page the touch stops working, I lose the ability to swipe up and down on the page.

I feel lost here, it worked perfectly fine with the old ViewPager

ViewPager fragment page

<ScrollView
    android:isScrollContainer="true"
    android:measureAllChildren="true"
    android:background="?backgroundColor"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">
    
    <androidx.constraintlayout.widget.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
        ...
    </androidx.constraintlayout.widget.ConstraintLayout>
 <ScrollView/>

ViewPager

<androidx.viewpager2.widget.ViewPager2
        android:orientation="horizontal"
        android:id="@+id/pager"
        android:layout_width="0dp"
        android:layout_height="0dp"
        ...
        />

Answer 1

I fixed the issue by updating ViewPager's PageTransformer.

I extended ViewPager2.PageTransformer on my PageTransformer thinking the old transformer would work just fine.

Looks like this is not the case, the old version was missing the translationZ looks like not setting the translationZ causes this behavior.