didenterbeacons and didentersite are calling repeatedly

hi, im trying bluecats sdk on Android, i want to run the beaconmanagercallback in a service but after a couple of minutes the didenterbeacons and didentersite are calling repeatedly, the bluecats beacon is on the same place and i don’t change my position, i want to know if this is normal, my code is:

@Override
public int onStartCommand(final Intent intent, final int flags, final int startId) {
super.onStartCommand(intent, flags, startId);

BlueCatsSDK.startPurringWithAppToken(getApplicationContext(), appToken);

if (!mRunning) {
mRunning = true;
System.out.println("not running");
myBCBeaconManagerCallback = new MyBCBeaconManagerCallback();
bcBeaconManager = new BCBeaconManager();
bcBeaconManager.registerCallback(myBCBeaconManagerCallback);
} else {
System.out.println("running");
}

return START_STICKY;
}

class MyBCBeaconManagerCallback extends BCBeaconManagerCallback {

@Override
public void didEnterSite(BCSite site) {
super.didEnterSite(site);

System.out.println("didentersite" + didEnterSite);

//show a message that the beacon was discovered
}

public void didEnterBeacons(List<BCBeacon> beacons) {
super.didEnterBeacons(beacons);

Log.d(TAG, "didEnterBeacons " + getBeaconNames(beacons));

}