i am using otpNet to generate otpUri, then using QRCoder to generate Qr code, send it to front end and then display and scan it in Microsoft authenticator app . It scans successfully, but when i enter the otp i recieved in authenticator app, it does not verify and totp.VerifyTotp returns false

QR code generation

var secret = "DHHSILAOBIBEYLXUYZ4UHIJCT3N3HXDB";     
var userName = "ABC";                
var otpUri = new OtpUri(OtpType.Totp, secret, userName, "Test MFA").ToString();

             
 // Generate QR code
 using (var qrGenerator = new QRCodeGenerator())
 using (var qrCodeData = qrGenerator.CreateQrCode(otpUri, QRCodeGenerator.ECCLevel.Q))
 using (var qrCode = new QRCode(qrCodeData))
 using (var qrCodeImage = qrCode.GetGraphic(20)) // Adjust size as needed
 using (var ms = new MemoryStream())
                {
                    qrCodeImage.Save(ms, System.Drawing.Imaging.ImageFormat.Png);
                    var qrCodeBase64 = Convert.ToBase64String(ms.ToArray());

                    // Return the Base64-encoded QR code image
                    return $"data:image/png;base64,{qrCodeBase64}";
                }

TOTP Verification

 var secret = "DHHSILAOBIBEYLXUYZ4UHIJCT3N3HXDB";
 var secretBytes = Base32Encoding.ToBytes(secret ?? string.Empty);

var totpCode = This is the code that i got from my authenticator app;

 var otpResult = totp.VerifyTotp(totpCode,
                 out var timeStepMatched,
                 VerificationWindow.RfcSpecifiedNetworkDelay);

 if (!otpResult)
         throw new Exception($"Provided TOTP code does not match.");