DS18B20 - getAddress gives duplicated HW addresses

[ssditt]

ESP32 and DallasTemperature.h Ver. 3.9.1
Having 9 sensors DS18B20 on single bus the function getAddress gives 2 addresses of DS18B20 duplicated.
Accessing DS18B20 via addresses is a must to avoid values shift in case of single DS18B20 failure.
Does library support more that 8 sensors? 8 sensors work fine.

  DeviceAddress DSaddress[16];
  int dc = sensors.getDeviceCount();
  for(int i=0; i<dc; i++) {
    sensors.getAddress(DSaddress[i],i);
    Serial.printf("\nDS%d:",i); printAddress(DSaddress[i]);
  }