Serial print an array using sprintf

Projects Programming
1

I would like to print an array of positions to the serial monitor using sprintf. But I am getting a string that prints the first element correctly, then a zero where the second element should be, and the second element where the third should be.

void setup() {
  Serial.begin(9600);

  long POS[3] = {123, 456, 789};
  
  char DEBUG_STRING[50];
  sprintf(DEBUG_STRING, "Position: %5d, %5d, %5d", POS[0], POS[1], POS[2]);
  Serial.println(DEBUG_STRING);
}

Serial Monitor Result:

Position:   123,     0,   456
2

The variable is long, not int. This works:
sprintf(DEBUG_STRING, "Position: %5ld, %5ld, %5ld", POS[0], POS[1], POS[2]);