سلام وقت بخیر 

من این مورد رو در اپلیکیشن طبق اموزش بررسی کردم مشکلی وجود نداشت 

احتمالا در لیوت یا کد هاتون موردی رو به اشتباه پیاده سازی کرده باشید.

کد‌های لیوت مربوطه خدمت شما:

<com.google.android.material.card.MaterialCardView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginStart="8dp"
    android:layout_marginTop="4dp"
    android:layout_marginEnd="8dp"
    android:layout_marginBottom="4dp"
    app:cardCornerRadius="8dp"
    app:cardElevation="2dp">
    <androidx.constraintlayout.widget.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        tools:minHeight="200dp">
        <ir.udmx.nikestore.view.NikeImageView
            android:id="@+id/productIv"
            android:layout_width="100dp"
            android:layout_height="100dp"
            android:layout_marginStart="16dp"
            android:layout_marginTop="16dp"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"/>
        <TextView
            android:id="@+id/productTitleTv"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginStart="16dp"
            android:layout_marginEnd="16dp"
            android:textAppearance="?textAppearanceHeadline6"
            app:layout_constraintBottom_toBottomOf="@+id/productIv"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toEndOf="@+id/productIv"
            app:layout_constraintTop_toTopOf="@+id/productIv"
            tools:text="Product Title" />
        <TextView
            android:id="@+id/previousPriceTv"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="8dp"
            android:layout_marginEnd="16dp"
            android:text="16000"
            android:textAppearance="?textAppearanceBody2"
            android:textColor="?android:textColorSecondary"
            app:layout_constraintBottom_toTopOf="@+id/currentPriceTv"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintTop_toTopOf="@+id/textView2"
            app:layout_constraintVertical_chainStyle="packed" />
        <TextView
            android:id="@+id/currentPriceTv"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="4dp"
            android:layout_marginEnd="16dp"
            android:textAppearance="?textAppearanceBody1"
            app:layout_constraintBottom_toBottomOf="@+id/decreaseBtn"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/previousPriceTv"
            tools:text="14000" />
        <TextView
            android:id="@+id/textView2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="8dp"
            android:text="@string/count"
            android:textAppearance="?textAppearanceBody1"
            android:textColor="?android:textColorSecondary"
            app:layout_constraintEnd_toEndOf="@+id/productIv"
            app:layout_constraintStart_toStartOf="@+id/productIv"
            app:layout_constraintTop_toBottomOf="@+id/productIv" />
        <TextView
            android:id="@+id/cartItemCountTv"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="8dp"
            android:textAppearance="?textAppearanceHeadline6"
            app:layout_constraintEnd_toEndOf="@+id/textView2"
            app:layout_constraintStart_toStartOf="@+id/textView2"
            app:layout_constraintTop_toBottomOf="@+id/textView2"
            tools:text="2" />
        <ImageView
            android:id="@+id/increaseBtn"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginEnd="16dp"
            android:background="?selectableItemBackgroundBorderless"
            app:layout_constraintBottom_toBottomOf="@+id/cartItemCountTv"
            app:layout_constraintEnd_toStartOf="@+id/cartItemCountTv"
            app:layout_constraintTop_toTopOf="@+id/cartItemCountTv"
            app:srcCompat="@drawable/ic_increase_cart_item_count" />
        <ImageView
            android:id="@+id/decreaseBtn"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginStart="16dp"
            android:background="?selectableItemBackgroundBorderless"
            app:layout_constraintBottom_toBottomOf="@+id/cartItemCountTv"
            app:layout_constraintStart_toEndOf="@+id/cartItemCountTv"
            app:layout_constraintTop_toTopOf="@+id/cartItemCountTv"
            app:srcCompat="@drawable/ic_decrease_cart_item_count" />
        <ProgressBar
            android:id="@+id/changeCountProgressBar"
            android:layout_width="0dp"
            android:layout_height="0dp"
            android:visibility="gone"
            app:layout_constraintBottom_toBottomOf="@+id/decreaseBtn"
            app:layout_constraintEnd_toStartOf="@+id/decreaseBtn"
            app:layout_constraintStart_toEndOf="@+id/increaseBtn"
            app:layout_constraintTop_toTopOf="@+id/decreaseBtn"
            tools:visibility="visible" />
        <TextView
            android:id="@+id/removeFromCartBtn"
            android:layout_width="0dp"
            android:layout_height="46dp"
            android:layout_marginTop="16dp"
            android:background="?selectableItemBackground"
            android:gravity="center"
            android:text="@string/removeFromCart"
            android:textAppearance="?textAppearanceBody1"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/decreaseBtn" />
        <View
            android:layout_width="0dp"
            android:layout_height="1dp"
            android:background="?dividerColor"
            app:layout_constraintBottom_toTopOf="@+id/removeFromCartBtn"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent" />
    </androidx.constraintlayout.widget.ConstraintLayout>
</com.google.android.material.card.MaterialCardView>