diff --git a/Changes.md b/Changes.md
index ee4c3f1..b609f99 100644
--- a/Changes.md
+++ b/Changes.md
@@ -3,6 +3,7 @@
 
 Version 401.1.2 - TBR
 ----------------------------
+1. Fix 'Orphaned Section still appear in Index Drawer' - #146.
 
 Version 401.1.1 - 14/08/2023
 ----------------------------
diff --git a/lib.php b/lib.php
index ffb1c2e..1256aa5 100644
--- a/lib.php
+++ b/lib.php
@@ -230,6 +230,28 @@ public function get_topcoll_section_name($course, $section, $additional) {
         return $o;
     }
 
+    /**
+     * Returns if an specific section is visible to the current user.
+     *
+     * Formats can overrride this method to implement any special section logic.
+     *
+     * @param section_info $section the section modinfo
+     * @return bool;
+     */
+    public function is_section_visible(section_info $section): bool {
+        if ($section->section > $this->get_last_section_number()) {
+            // Stealth section.
+            global $PAGE;
+            $context = context_course::instance($this->course->id);
+            if ($PAGE->user_is_editing() && has_capability('moodle/course:update', $context)) {
+                $modinfo = get_fast_modinfo($this->course);
+                // If the stealth section has modules then is visible.
+                return (!empty($modinfo->sections[$section->section]));
+            }
+        }
+        return parent::is_section_visible($section);
+    }
+
     public function get_section_dates($section, $course = null, $tcsettings = null) {
         if (empty($tcsettings) && empty($course)) {
             return $this->format_topcoll_get_section_dates($section, $this->get_course());