Arduino stops working after some receivings from RF

Question

I made a sketch that receives an rgb code from a remote Arduino using nrf24l01 and while it works for the first receivings then it stops working. I placed a testing Serial.println in the loop to test if Arduino stops to work completely or it doesn't receive any other data. Finally, I understood that it continues to work but it doesnt receive more data. Bellow is my code:

#include <RF24Network.h>
#include <RF24Network_config.h>
#include <Sync.h>

#include  <TimerOne.h>
#include <SPI.h>
//#include <nRF24L01.h>
#include <RF24.h>
RF24 radio(8,10);
RF24Network network(radio);
volatile int i=0; 
volatile int d=0;     // Variable to use as a counter
volatile boolean zero_cross=0;  // Boolean to store a "switch" to tell us if we have crossed zero
int AC_pin= 4;    // Output to Opto Triac pin
int dim = 0;  // Dimming level (0-128)  0 = ON, 128 = OFF
int freqStep = 65; 

struct payload_rgb
{
  unsigned int red;
  unsigned int green;
  unsigned int blue;
};
struct payload_lightuv
{
  unsigned int light;
  unsigned int uv;
};
RF24NetworkHeader header;
payload_rgb payloadrgb;
payload_lightuv payloadl;
void setup() {
  // put your setup code here, to run once:
  pinMode(AC_pin, OUTPUT);// Set AC Load pin as output
  pinMode(9, OUTPUT);// Set AC Load pin as output
  pinMode(5, OUTPUT);
  pinMode(6, OUTPUT);
  attachInterrupt(0, zero_cross_detect, RISING);  // Choose the zero cross interrupt # from the table above
  Timer1.initialize(freqStep);                      // Initialize TimerOne library for the freq we need
  Timer1.attachInterrupt(dim_check, freqStep);    
  Serial.begin(115200);
  radio.begin();
  network.begin(90,01);
}


void loop() {
  network.update();
  while ( network.available() )
  {
    Serial.println("Rec");

    network.peek(header);
    if(header.type=='r'){
      network.read(header,&payloadrgb,sizeof(payloadrgb));
      analogWrite(6,payloadrgb.red);
      analogWrite(9,payloadrgb.green);
      analogWrite(5,payloadrgb.blue);
    }
    if(header.type=='l'){
      network.read(header,&payloadl,sizeof(payloadl));
      dim=payloadl.light;
    }
}
Serial.println("!"); //this is the test println
}
void zero_cross_detect() {    
  zero_cross = true;               // set the boolean to true to tell our dimming function that a zero cross has occured
  i=0;
  digitalWrite(AC_pin, LOW);       // turn off TRIAC (and AC)
}   
void dim_check() {                   
  if(zero_cross == true) {              
    if(i>=dim) {                     
      digitalWrite(AC_pin, HIGH); // turn on light       
      i=0;  // reset time step counter                         
      zero_cross = false; //reset zero cross detection
    } 
    else {
      i++; // increment time step counter                     
    }                                
  }                                  
}}

Additionally, this Arduino controls an ac dimmer. Bu I have not done it yet. How can I fix the problem without removing any feature?