Textview disappearing when text too long

[mikylucky]

Hi, I'm experiecing this issue: I have some textviews in an observablescrollview. If the text in the textview is long, on scroll text start flashing, while if it's even longer text won't appear neither.

This is my XML

<FrameLayout` xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:fab="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <com.github.ksoichiro.android.observablescrollview.ObservableScrollView
        android:id="@+id/post_scrollView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        xmlns:tools="http://schemas.android.com/tools"
        xmlns:fab="http://schemas.android.com/apk/res-auto"
        tools:context="com.trackarena.SinglePostFragment"
        >
        <RelativeLayout
            android:layout_height="match_parent"
            android:layout_width="match_parent">
            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:orientation="vertical"
                >
                <ImageView
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:id="@+id/post_image"
                    android:scaleType="fitCenter"
                    android:adjustViewBounds="true"/>

                <LinearLayout
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:orientation="vertical"
                    android:background="@color/white">

                    <TextView
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:id="@+id/post_title"
                        android:alpha="0.87"
                        android:textColor="#000000"
                        android:textSize="24sp"
                        android:layout_margin="10dp"
                        android:gravity="center"/>

                    <TextView
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:id="@+id/post_author"
                        android:alpha="0.87"
                        android:textColor="#000000"
                        android:textSize="14sp"
                        android:layout_margin="10dp"
                        android:gravity="left" />

                    <TextView
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:id="@+id/post_content"
                        android:alpha="0.87"
                        android:textColor="#000000"
                        android:textColorLink="#FA4400"
                        android:textSize="16sp"
                        android:layout_margin="12dp" />

                </LinearLayout>

            </LinearLayout>
        </RelativeLayout>

    </com.github.ksoichiro.android.observablescrollview.ObservableScrollView>

    <com.github.clans.fab.FloatingActionMenu
        android:id="@+id/post_fab_menu"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom|right"
        android:layout_marginBottom="16dp"
        android:layout_marginRight="16dp"
        fab:menu_colorNormal="@color/orange"
        fab:menu_colorPressed="#F47700"
        fab:menu_colorRipple="#F45500"
        fab:menu_animationDelayPerItem="50"
        fab:menu_icon="@drawable/ic_share_white_24dp"
        fab:menu_labels_textColor="#FFFFFF"
        fab:menu_labels_textSize="14sp"
        fab:menu_labels_cornerRadius="3dp"
        fab:menu_labels_colorNormal="#333333"
        fab:menu_labels_colorPressed="#444444"
        fab:menu_labels_colorRipple="#66FFFFFF">

        <com.github.clans.fab.FloatingActionButton
            android:id="@+id/post_menu_facebook_item"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@drawable/ic_facebook_white_24dp"
            fab:fab_size="mini"
            fab:fab_colorNormal="#3b5998"
            fab:fab_colorPressed="#8b9dc3"
            fab:fab_label="Condividi su Facebook"
            android:onClick="facebookShareDialog"/>

    </com.github.clans.fab.FloatingActionMenu>

</FrameLayout>