FS-6054

src/switch_core_media.c

@@ -3739,7 +3739,7 @@ SWITCH_DECLARE(int) switch_core_media_toggle_hold(switch_core_session_t *session
 
 			if (!switch_media_handle_test_media_flag(smh, SCMF_DISABLE_RTP_AUTOADJ) &&
 				!((val = switch_channel_get_variable(session->channel, "disable_rtp_auto_adjust")) && switch_true(val)) && 
-				!switch_channel_test_flag(session->channel, CF_WEBRTC)) {
+				!switch_channel_test_flag(session->channel, CF_WEBRTC) && a_engine->rtp_session) {
 				/* Reactivate the NAT buster flag. */
 				switch_rtp_set_flag(a_engine->rtp_session, SWITCH_RTP_FLAG_AUTOADJ);
 			}