Org.BouncyCastle.Crypto.InvalidCypherTextException: pad block corrupted (C# .net core 5)

Question

I have a private key:

-----BEGIN RSA PRIVATE KEY-----
Proc-Type: 4,ENCRYPTED
DEK-Info: DES-EDE3-CBC,35E517D660EB89EC
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-----END RSA PRIVATE KEY-----

The encrypted private key has a passphrase test1234

This code fails with pad block corrupted:

string rsaPrivateKey = @"-----BEGIN RSA PRIVATE KEY-----
Proc-Type: 4,ENCRYPTED
DEK-Info: DES-EDE3-CBC,35E517D660EB89EC
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-----END RSA PRIVATE KEY-----";

TextReader textReader = new StringReader(rsaPrivateKey);
PemReader pemReader = new PemReader(textReader, new PasswordFinder("test1234"));
object privateKeyObject = pemReader.ReadObject(); // Error Here
Console.WriteLine(privateKeyObject.ToString());

I saw here (C# Bouncy Castle decoding private key) a similar question, but I have no unicode characters in my passphrase.

Any ideas what I am doing wrong?