correctly shutdown / restart (stop advertising and resume)

[infrafast]

hello I made an end() method which is supposed to stop the BLEMIDI but none of the code after calling all of the end() and stop() below, the esp32 is still advertising ...
can you let me know how to properly shutdown it...

    virtual bool end() override{
      DEBUG_PRINT("\n%s::end()",interfaceName.c_str());          
      auto transport = bleMIDI.getTransport();  // ✅ On récupère le transport BLE
      hasBegun = false;
      if (transport) {
          if (hasBegun){
            transport->end();     
            BLEbleMIDI.end();    // does nothing                   
            BLEDevice::getAdvertising()->stop();            
          }else{
            DEBUG_PRINT("\n\ttransport->end() ignored (!hasBegun)");    
          }
          // bleMIDI.end() doesnt exists
          return true;
      }
      return false;    
    }  

and here is my begin() method which is called when enabling the service

    virtual bool begin(){
      DEBUG_PRINT("\n%s::begin()",interfaceName.c_str());          
      MIDIInterface::init();  
      bleInstancePtr = this;   // do not forget otherwise callback function will crash

      BLEbleMIDI.setHandleConnected(handleConnectedStatic);
      BLEbleMIDI.setHandleDisconnected(handleDisconnectedStatic);
      
      bleMIDI.setHandleSystemExclusive(handleSysexStatic);

      if (!hasBegun){
        if (state.enabled){
          setStatePending();            
          DEBUG_PRINT("\n\tbleMIDI.begin()");          
          bleMIDI.begin();                
          hasBegun = true;
        }else{
          DEBUG_PRINT("\n\tbleMIDI.begin() ignored (disabled)");          
        }
      }else{
        DEBUG_PRINT("\n\tbleMIDI.begin() ignored (hasBegun)");          
      }             
      return true;
    }