lighthouese doesn't track new thread

[yooo1999]

I wrote a very simple code, and attach with frida immediately .
When I parse the frida-cov.log I saw that lighthouese color the main function but doesn't color the foo function.
looks like lighthouese doesn't track new thread

python frida-drcov.py test_threads

#include <stdio.h>
#include <string.h>
#include <pthread.h>
#include <unistd.h>
int i = 2;
void* foo(void* p){
	int counter = 0;
	while (counter<10){
	counter++;
	sleep(1);
  
	printf("counter= %d \n ",counter);
  
	}
  pthread_exit(&i);
}
int main(void){
  
  pthread_t id;
  sleep(5);
  int j = 1;
  pthread_create(&id, NULL, foo, &j);

  int* ptr;
  pthread_join(id, (void**)&ptr);
}