Send diff first when when sending the first stratum template after subscribing

src/stratifier.c

@@ -3534,6 +3534,13 @@ static void suggest_diff(stratum_instance_t *client, const char *method, const j
 	stratum_send_diff(sdata, client);
 }
 
+/* Send diff first when sending the first stratum template after subscribing */
+static void init_client(sdata_t *sdata, const stratum_instance_t *client, const int64_t client_id)
+{
+	stratum_send_diff(sdata, client);
+	stratum_send_update(sdata, client_id, true);
+}
+
 /* Enter with client holding ref count */
 static void parse_method(sdata_t *sdata, stratum_instance_t *client, const int64_t client_id,
 			 json_t *id_val, json_t *method_val, json_t *params_val)
@@ -3572,7 +3579,7 @@ static void parse_method(sdata_t *sdata, stratum_instance_t *client, const int64
 		json_object_set_new_nocheck(val, "error", json_null());
 		stratum_add_send(sdata, val, client_id);
 		if (likely(client->subscribed))
-			update_client(sdata, client, client_id);
+			init_client(sdata, client, client_id);
 		return;
 	}