diff --git a/theme/boost/classes/boostnavbar.php b/theme/boost/classes/boostnavbar.php
index bd33f611b659c..c438148375923 100644
--- a/theme/boost/classes/boostnavbar.php
+++ b/theme/boost/classes/boostnavbar.php
@@ -73,8 +73,11 @@ protected function prepare_nodes_for_boost(): void {
             // Remove 'My courses' and 'Courses' if we are in the course context.
             $this->remove('mycourses');
             $this->remove('courses');
-            // Remove the course category breadcrumb node.
-            $this->remove($this->page->course->category, \breadcrumb_navigation_node::TYPE_CATEGORY);
+            // Remove the course category breadcrumb nodes.
+            foreach ($this->items as $key => $item) {
+                // Remove if it is a course category breadcrumb node.
+                $this->remove($item->key, \breadcrumb_navigation_node::TYPE_CATEGORY);
+            }
             // Remove the course breadcrumb node.
             $this->remove($this->page->course->id, \breadcrumb_navigation_node::TYPE_COURSE);
             // Remove the navbar nodes that already exist in the secondary navigation menu.
@@ -103,8 +106,11 @@ protected function prepare_nodes_for_boost(): void {
         if ($this->page->context->contextlevel == CONTEXT_MODULE) {
             $this->remove('mycourses');
             $this->remove('courses');
-            // Remove the course category breadcrumb node.
-            $this->remove($this->page->course->category, \breadcrumb_navigation_node::TYPE_CATEGORY);
+            // Remove the course category breadcrumb nodes.
+            foreach ($this->items as $key => $item) {
+                // Remove if it is a course category breadcrumb node.
+                $this->remove($item->key, \breadcrumb_navigation_node::TYPE_CATEGORY);
+            }
             $courseformat = course_get_format($this->page->course)->get_course();
             // Section items can be only removed if a course layout (coursedisplay) is not explicitly set in the
             // given course format or the set course layout is not 'One section per page'.