I have made some tests. It should habe something to do with my auth-check in a "foreign" session. The authcode at beginning of index.php is like that:
Code:
$session_params = session_get_cookie_params();
session_name( "MySession");
session_start();
$session = $_SESSION[COOKIE];
session_write_close();
// Reset Session_Cookie_Params
session_set_cookie_params( $session_params['lifetime'] , $session_params['path'], $session_params['domain'] );
// Reset Session_id
session_id( md5(uniqid(microtime()) );
Using this code with other apps works fine.
Nethertheless the toptags should be refreshed at once when adding a new tag.