revert the commit since the issue won't fix.
@@ -2132,6 +2132,12 @@ port_INLINE void activity_ri9(PORT_TIMER_WIDTH capturedTime) {
// clear local variable
ieee154e_vars.ackToSend = NULL;
+ if ((idmanager_getIsDAGroot()==FALSE &&
+ icmpv6rpl_isPreferredParent(&(ieee154e_vars.dataReceived->l2_nextORpreviousHop))) ||
+ IEEE802154_security_isConfigured() == FALSE) {
+ synchronizePacket(ieee154e_vars.syncCapturedTime);
+ }
+
// inform upper layer of reception (after ACK sent)
notif_receive(ieee154e_vars.dataReceived);
