ESP8266 pubsubclient subscribe fail querying 1 MQTT topic

Looking at earlier post I raise this topic again because I don't get it.
My setup is based on Domoticz repository on a RBPi with a MQTT Mosquitto broker.
my setup tests done with MQTT test client to verify the messages can be subscribed. Using MacOS and Iphone with tooling it is successful.
On Domoticz the output topic can be published several way's I have selected to use the output format topic: domoticz/out/ is a reference unique id in the Domoticz environment.
The strange situation I have on my ESP8266 client. Programming is performed in the Arduino sketch IDE. My hardware is a Uno with an onboard ESP. publishing data is going fine.
When I subscribe with domoticz/out/# I get a response in my terminal.
When I subscribe to a lower range number it also works. eg. domoticz/out/350 I get also response but when I want to subscribe with a switch I have made as a dummy it will not work.
Verified with an external tool like MQTTool or MQTTAnalyzer I am able to subscribe and get an answer.
Testing with the standard example code that comes with the PubSubClient.
also on broker level I see the message.
mosquitto_sub -h 10.0.3.28 -t "domoticz/out/497" I get a response.

Cannot understand why this is not working.

Any thoughts how to tackel this?

I'm am terribly sorry that I am unable to reproduce your code based upon your description of your issue. If you could save a bit of time for those who are interested in helping you, could you, pretty please, post your code?

IN CODE TAGS!

/*********
Rui Santos // thanks to Rui for downloading my code via WIFI

Arduino IDE example: Examples > Arduino OTA > BasicOTA.ino
*********/

#include <ArduinoJson.h>
#include <ESP8266WiFi.h>
#include <ESP8266mDNS.h>
#include <WiFiUdp.h>
#include <ArduinoOTA.h>
#include <PubSubClient.h>

#include <string.h>
#define MSG_BUFFER_SIZE (128)
//#define MQTT_KEEPALIVE 1000

WiFiClient espWIFIClient;
PubSubClient Client(espWIFIClient);

byte mac = { xxxxxxxx };
IPAddress ip (10,0,3,65);

//constants
const char* ssid = "xxxxxxx";
const char* password = "xxxxxxxxxx";
const int ESP_BUILTIN_LED = 2;
const char* mqttServer = "10.0.3.28";
const int mqttPort = 1883;
const char* mqttUser = "";
const char* mqttPassword = "";
unsigned long lastMsg = 0;
char msg[MSG_BUFFER_SIZE];
int value = 0;

// setup of parameters as minimum to also download code via WIFI

void setup() {
//serial port setting for this code for debugging, when using serial port for serial communication between ESP8266 and Arduino remove serial print !
Serial.begin(9600);
while (!Serial) continue;
//WIFI start connection and authentication
Serial.println("Booting");
WiFi.mode(WIFI_STA);
WiFi.begin(ssid, password);
while (WiFi.waitForConnectResult() != WL_CONNECTED) {
Serial.println("Connection Failed! Rebooting...");
delay(5000);
ESP.restart();
}

// Port defaults to 8266
// ArduinoOTA.setPort(8266);
// Hostname defaults to esp8266-[ChipID]
// this part is important to download code over WIFI

ArduinoOTA.setHostname("SENSOR2");
// No authentication by default
// ArduinoOTA.setPassword((const char *)"123");
ArduinoOTA.onStart( {
Serial.println("Start");
});
ArduinoOTA.onEnd( {
Serial.println("\nEnd");
});
ArduinoOTA.onProgress((unsigned int progress, unsigned int total) {
Serial.printf("Progress: %u%%\r", (progress / (total / 100)));
});
ArduinoOTA.onError((ota_error_t error) {
Serial.printf("Error[%u]: ", error);
if (error == OTA_AUTH_ERROR) Serial.println("Auth Failed");
else if (error == OTA_BEGIN_ERROR) Serial.println("Begin Failed");
else if (error == OTA_CONNECT_ERROR) Serial.println("Connect Failed");
else if (error == OTA_RECEIVE_ERROR) Serial.println("Receive Failed");
else if (error == OTA_END_ERROR) Serial.println("End Failed");
});
ArduinoOTA.begin();
Serial.println("Ready");
Serial.print("IP address: ");
Serial.println(WiFi.localIP());

// setting the loging credentials for the MQTT server connection
Client.setServer(mqttServer, mqttPort);
Client.setCallback(callback);
//
while (!Client.connected()) {
Serial.println("Connecting to MQTT...");
if (Client.connect("SENSOR3", mqttUser, mqttPassword )) {
Serial.println("initial connect");
Client.subscribe("domoticz/out/497/"); // when I use domoticz/out/350 I get a response I have checked with other MQTT tools if domoticz/out/497 responds and this is the case. also on mosquitto level this topic I can see. Don't understand this strange behaviour.
// Client.setKeepAlive( MQTT_KEEPALIVE );

} else {

  Serial.print("failed with state ");
  Serial.print(Client.state());
  delay(2000);
}

//
}
}
//END of SETUP PART

//void callback(char* topic, byte* payload, unsigned int length) {
// StaticJsonDocument<256> doc;
// deserializeJson(doc, payload, length);
//
//
//}

//void callback(char* topic, byte* payload, unsigned int length) {
// Serial.print("Message arrived [");
// Serial.print(topic);
// Serial.print("] ");
// for (int i=0;i<length;i++) {
// Serial.print((char)payload[i]);
// }
// Serial.println();
//}

void callback(char* topic, byte* payload, unsigned int length) { //callback includes topic and payload ( from which (topic) the payload is coming)
char str[length+1];
Serial.print("Message arrived [");
Serial.print(topic);
Serial.print("] ");
int i=0;
for (int i = 0; i < length; i++)
{
Serial.print((char)payload[i]);
str[i]=(char)payload[i];
}
str[i] = 0; // Null termination
Serial.println();
}

//END VOID callback

void reconnect() {
// Loop until we're reconnected
while (!Client.connected()) {
Serial.print("Attempting MQTT connection...");

// Attempt to connect
if (Client.connect("SENSOR2", mqttUser, mqttPassword)) {
Serial.println("re-connected");
// Subscribe or resubscribe to a topic
// You can subscribe to more topics (to control more outputs)
Client.subscribe("domoticz/out/497"); // in my log is see that the code is not reconnecting at the end of this code a concatenate the print log.
Serial.print("Subscribe");
// Client.setKeepAlive( MQTT_KEEPALIVE );

} else {
  Serial.print("failed, rc=");
  Serial.print(Client.state());
  Serial.println(" try again in 5 seconds");
  // Wait 5 seconds before retrying
  delay(5000);
}

}
}

void loop() {
ArduinoOTA.handle();{
Client.loop();
}
}

// if (!Client.connected())
//
// {
// reconnect();
//
// }
// Client.loop();
//
//
//
// }
//}

20:52:07.020 -> SDK:2.2.2-dev(38a443e)/Core:3.0.2=30002000/lwIP:STABLE-2_1_2_RELEASE/glue:1.2-48-g7421258/BearSSL:6105635 20:52:07.129 -> Booting 20:52:07.129 -> fpm close 1 20:52:07.163 -> mode : sta(a0:20:a6:23:35:af) 20:52:07.196 -> add if0 20:52:07.196 -> wifi evt: 8 20:52:07.653 -> wifi evt: 2 20:52:09.881 -> scandone 20:52:10.808 -> state: 0 -> 2 (b0) 20:52:10.808 -> state: 2 -> 3 (0) 20:52:10.845 -> state: 3 -> 5 (10) 20:52:10.845 -> add 0 20:52:10.845 -> aid 2 20:52:10.881 -> cnt 20:52:10.881 -> 20:52:10.881 -> connected with isegimplein, channel 5 20:52:10.881 -> dhcp client start... 20:52:10.917 -> wifi evt: 0 20:52:10.917 -> ip:10.0.3.65,mask:255.255.255.0,gw:10.0.3.139 20:52:10.953 -> wifi evt: 3 20:52:10.986 -> Ready 20:52:10.986 -> IP address: 10.0.3.65 20:52:11.019 -> Connecting to MQTT... 20:52:11.053 -> [hostByName] Host: 10.0.3.28 is a IP! 20:52:11.155 -> initial connect 20:52:20.809 -> pm open,type:2 0

code tags?

I have posted my code not completely clean but based on this code I see differences.
In the code I provided some context what my issue is.
at the bottom I have put the log of the serial port
Hope you can give me a direction.