get_terms() delivers wrong count with custom taxonomy childs on custom post type

I have a custom taxonomy lets call it "indications". We use it with a custom post type "Product". We use a hierarchy for the terms Parent->Child. The Parent has never an connection with a product. I use it to make a custom select field and would need the parents to be the optgroup header.

Is use this structure

  • sub child 1 (2 posts according to backend)
  • sub child 2 (1 post according to backend)

But if I query for the child theme and check the count it always shows with NULL. In the WordPress Dashboard it shoes it correctly with 2 and 1.

Why not in the front end.

  $args = array(
          'hide_empty' => false, 
          'orderby' => 'name'
  $ins = get_terms('indikationen', $args);

    echo "<select>";
    foreach($ins as $in):

        if ( count( get_term_children( $in->term_id, 'indikationen' ) ) > 0 ):
        echo '<optgroup label="'.$in->name.'">';
          foreach($ins as $sub):
            if($sub->parent == $in->term_id):
                echo "<option value='".$sub->term_id."'>".$sub->name. " count: ".$sub->count."</option>";
          // SUB-COUNT is always NULL but has correct count in backend
        echo '</optgroup>';
            echo "<option value='".$in->term_id."'>" .$in->name. " (".$in->count.")</option>";
    echo "</select>";

What am I doing wrong?

// shows me for count also NULL


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get_terms() delivers wrong count with custom taxonomy childs on custom post type

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