MDL-76940 core_courseformat: Index refreshing when role switch

* Hidden sections and content should not visible to students when switching role

lib/accesslib.php

@@ -4397,6 +4397,11 @@ function role_switch($roleid, context $context) {
         load_all_capabilities();
     }
 
+    // Make sure that course index is refreshed.
+    if ($coursecontext = $context->get_course_context()) {
+        core_courseformat\base::session_cache_reset(get_course($coursecontext->instanceid));
+    }
+
     // Add the switch RA
     if ($roleid == 0) {
         unset($USER->access['rsw'][$context->path]);