Any exceptions to the success story of using Android Keystore to generate keys?

Question

Given that there are many known issues with Android Keystore and his ability to lose data or just generally fall (see. Here , here , here , here , here and here ) I find it interesting to know whether any developer used Keystore Android in live application to generate keys and did not encounter a lot of crash reports due to the fact that Keystore can not create or get a key from Keystore? How did you get around known issues? I am particularly interested in a scenario in which a class is KeyPairGeneratorused to create a private-public key pair that does not require user authentication (i.e. does not require a screen lock on the device).

Edit: I included below code that I used to create a private-public key pair via Android Keystore:

KeyPair createPrivateKeyEntry(@NonNull Context context,
                              @NonNull String keyAlias) throws CryptoException {
    try {
        AlgorithmParameterSpec spec = getAlgorithmParameterSpec(context, keyAlias);

        KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance(
                "RSA",
                "AndroidKeyStore"
        );

        keyPairGenerator.initialize(spec);
        return keyPairGenerator.generateKeyPair();
    } catch (Exception e) {
        String message = "Unexpected error when attempting to create a private key entry.";
        throw new CryptoException(message, e);
    }
}

private AlgorithmParameterSpec getAlgorithmParameterSpec(@NonNull Context context,
                                                         @NonNull String keyAlias) {
    int keySize = 2048;
    X500Principal subject = new X500Principal("CN=" + keyAlias);
    BigInteger serialNumber = BigInteger.valueOf(1337);

    Calendar validityStartCalendar = Calendar.getInstance();
    Calendar validityEndCalendar = Calendar.getInstance();
    validityEndCalendar.add(Calendar.YEAR, 99);

    Date validityStartDate = validityStartCalendar.getTime();
    Date validityEndDate = validityEndCalendar.getTime();

    AlgorithmParameterSpec spec;

    if (Build.VERSION.SDK_INT >= 23) {
        spec = new KeyGenParameterSpec.Builder(keyAlias, KeyProperties.PURPOSE_ENCRYPT | KeyProperties.PURPOSE_DECRYPT)
                .setKeySize(keySize)
                .setEncryptionPaddings(KeyProperties.ENCRYPTION_PADDING_RSA_PKCS1)
                .setSignaturePaddings(KeyProperties.SIGNATURE_PADDING_RSA_PKCS1)
                .setCertificateSubject(subject)
                .setCertificateSerialNumber(serialNumber)
                .setKeyValidityStart(validityStartDate)
                .setKeyValidityEnd(validityEndDate)
                .setUserAuthenticationRequired(false)
                .build();
    } else {
        spec = new KeyPairGeneratorSpec.Builder(context)
                .setAlias(keyAlias)
                .setKeySize(keySize)
                .setSubject(subject)
                .setSerialNumber(serialNumber)
                .setStartDate(validityStartDate)
                .setEndDate(validityEndDate)
                .build();
    }

    return spec;
}