Broken space handling in Common Name since version 2.3.0

[mguzlews]

Hello,

starting from the version 2.3.0 (last working version 2.2.1) spaces are removed from the beginning of the Common Name (X509Name). I don't know if this change is intentional but a bunch of our logic requires spaces at the beginning of the common name for padding purposes.

Current behavior: "CN= Test" becomes "CN=Test" in the certificate
Expected behavior: "CN= Test" stays "CN= Test"

Could you restore previous space handling behavior?
Thanks in advance

Demo:

 public static void Main()
 {
     const string commonName = "CN= Test"; // Common Name with space at the beginning

     var keyPairGenerator = new RsaKeyPairGenerator();
     keyPairGenerator.Init(new KeyGenerationParameters(new SecureRandom(), 2048));
     AsymmetricCipherKeyPair keyPair = keyPairGenerator.GenerateKeyPair();

     var gen = new X509V3CertificateGenerator();
     var CN = new X509Name(commonName);
     gen.SetSubjectDN(CN);
     gen.SetIssuerDN(CN);
     gen.SetSerialNumber(Org.BouncyCastle.Math.BigInteger.One);
     gen.SetNotBefore(DateTime.UtcNow.Date);
     gen.SetNotAfter(DateTime.UtcNow.Date.AddYears(1));
     gen.SetPublicKey(keyPair.Public);

     var signatureFactory = new Asn1SignatureFactory("SHA256WithRSA", keyPair.Private);
     var certificate = gen.Generate(signatureFactory);

     // Check if Common Name is correct
     if (certificate.SubjectDN.ToString() != commonName)
     {
         throw new Exception($"Incorrect common name, expected {commonName}, got {certificate.SubjectDN}");
     }
 }

[mguzlews]

Found workaround

string commonName = " Test";
var CN = new X509Name(new List<DerObjectIdentifier>() { X509Name.CN }, new List<string>() { commonName });