Checkboxes Become Unchecked When Adding Items To Recycler View

I'm making a list of check items and using a recycler view to update the list when a new item is added. I'm able to check and uncheck them just fine but after having about 6 checked items I run into a problem.

The problem is that adding a new item to the list containing 6 checked items will result in a couple of the checked items becoming unchecked. I have no idea where the problem could possibly be and no one else seems to have had this problem.

Here is my checkbox XML:

xmlns:android="http://ift.tt/nIICcg"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingTop="10dp"
android:paddingBottom="10dp">

<CheckedTextView
    android:id="@+id/checkedTextView"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_weight="1"
    android:onClick="itemClick"
    android:checkMark="?android:attr/listChoiceIndicatorMultiple"/>

And this is how I check the box when you tap on it:

public void itemClick(View view)
{
   Snackbar.make(view, "Checklist Item Checked! ", Snackbar.LENGTH_LONG).setAction("Action", null).show();
   CheckedTextView checkList = (CheckedTextView) view.findViewById(R.id.checkedTextView);
   checkList.toggle();
}