Having issue in production reading keyvault, seeing an exception

Question

We are seeing this exception but very rarely. 


                SecretClientOptions options = new SecretClientOptions()
                {
                    Retry =
                    {
                        Delay= TimeSpan.FromSeconds(2),
                        MaxDelay = TimeSpan.FromSeconds(16),
                        MaxRetries = 5,
                        Mode = RetryMode.Exponential
                    }
                };

                string tenantId = _configuration.GetSection("Azure:JwtTenantId").Value;
                string clientId = _configuration.GetSection("Azure:JwtClientId").Value;
                string clientSecret = _configuration.GetSection("Azure:JwtClientSecret").Value;

                ClientSecretCredential clientSecretCredential = new ClientSecretCredential(tenantId, clientId, clientSecret);

                var client = new SecretClient(new Uri(KeyVaultUri), clientSecretCredential, options);

                var keyvaultSecret = client.GetSecret("JwtSecret");


Exception:Azure.Identity.AuthenticationFailedException: ClientSecretCredential authentication failed: Index was outside the bounds of the array.
 ---> System.IndexOutOfRangeException: Index was outside the bounds of the array.
   at System.Net.Http.Headers.HttpHeaders.ReadStoreValues[T](Span`1 values, Object storeValue, HttpHeaderParser parser, Int32& currentIndex)
   at System.Net.Http.Headers.HttpHeaders.GetStoreValuesAsStringOrStringArray(HeaderDescriptor descriptor, Object sourceValues, String& singleValue, String[]& multiValue)
   at System.Net.Http.Headers.HttpHeaders.GetEnumeratorCore()+MoveNext()
   at Azure.Core.Pipeline.HttpClientTransport.GetHeaders(HttpHeaders headers, HttpContent content)+MoveNext()
   at Azure.Core.HttpPipelineMessageHandler.ToHttpResponseMessage(Response response)
   at Azure.Core.HttpPipelineMessageHandler.SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
   at System.Net.Http.HttpClient.<SendAsync>g__Core|83_0(HttpRequestMessage request, HttpCompletionOption completionOption, CancellationTokenSource cts, Boolean disposeCts, CancellationTokenSource pendingRequestsCts, CancellationToken originalCancellationToken)
   at Microsoft.Identity.Client.Http.HttpManager.ExecuteAsync(Uri endpoint, IDictionary`2 headers, HttpContent body, HttpMethod method, ILoggerAdapter logger, CancellationToken cancellationToken)
   at Microsoft.Identity.Client.Http.HttpManager.ExecuteWithRetryAsync(Uri endpoint, IDictionary`2 headers, HttpContent body, HttpMethod method, ILoggerAdapter logger, Boolean doNotThrow, Boolean retry, CancellationToken cancellationToken)
   at Microsoft.Identity.Client.Http.HttpManager.SendPostAsync(Uri endpoint, IDictionary`2 headers, HttpContent body, ILoggerAdapter logger, CancellationToken cancellationToken)
   at Microsoft.Identity.Client.Http.HttpManager.SendPostAsync(Uri endpoint, IDictionary`2 headers, IDictionary`2 bodyParameters, ILoggerAdapter logger, CancellationToken cancellationToken)
   at Microsoft.Identity.Client.OAuth2.OAuth2Client.ExecuteRequestAsync[T](Uri endPoint, HttpMethod method, RequestContext requestContext, Boolean expectErrorsOn200OK, Boolean addCommonHeaders, Func`2 onBeforePostRequestData)
   at Microsoft.Identity.Client.OAuth2.OAuth2Client.GetTokenAsync(Uri endPoint, RequestContext requestContext, Boolean addCommonHeaders, Func`2 onBeforePostRequestHandler)
   at Microsoft.Identity.Client.OAuth2.TokenClient.SendHttpAndClearTelemetryAsync(String tokenEndpoint, ILoggerAdapter logger)
   at Microsoft.Identity.Client.OAuth2.TokenClient.SendTokenRequestAsync(IDictionary`2 additionalBodyParameters, String scopeOverride, String tokenEndpointOverride, CancellationToken cancellationToken)
   at Microsoft.Identity.Client.Internal.Requests.ClientCredentialRequest.FetchNewAccessTokenAsync(CancellationToken cancellationToken)
   at Microsoft.Identity.Client.Internal.Requests.ClientCredentialRequest.ExecuteAsync(CancellationToken cancellationToken)
   at Microsoft.Identity.Client.Internal.Requests.RequestBase.RunAsync(CancellationToken cancellationToken)
   at Microsoft.Identity.Client.ApiConfig.Executors.ConfidentialClientExecutor.ExecuteAsync(AcquireTokenCommonParameters commonParameters, AcquireTokenForClientParameters clientParameters, CancellationToken cancellationToken)
   at Azure.Identity.AbstractAcquireTokenParameterBuilderExtensions.ExecuteAsync[T](AbstractAcquireTokenParameterBuilder`1 builder, Boolean async, CancellationToken cancellationToken)
   at Azure.Identity.MsalConfidentialClient.AcquireTokenForClientCoreAsync(String[] scopes, String tenantId, Boolean async, CancellationToken cancellationToken)
   at Azure.Identity.MsalConfidentialClient.AcquireTokenForClientAsync(String[] scopes, String tenantId, Boolean async, CancellationToken cancellationToken)
   at Azure.Identity.ClientSecretCredential.GetToken(TokenRequestContext requestContext, CancellationToken cancellationToken)
   --- End of inner exception stack trace ---
   at Azure.Identity.CredentialDiagnosticScope.FailWrapAndThrow(Exception ex, String additionalMessage)
   at Azure.Identity.ClientSecretCredential.GetToken(TokenRequestContext requestContext, CancellationToken cancellationToken)
   at Azure.Core.Pipeline.BearerTokenAuthenticationPolicy.AccessTokenCache.GetHeaderValueFromCredentialAsync(TokenRequestContext context, Boolean async, CancellationToken cancellationToken)
   at Azure.Core.Pipeline.BearerTokenAuthenticationPolicy.AccessTokenCache.GetHeaderValueAsync(HttpMessage message, TokenRequestContext context, Boolean async)
   at Azure.Core.Pipeline.BearerTokenAuthenticationPolicy.AccessTokenCache.GetHeaderValueAsync(HttpMessage message, TokenRequestContext context, Boolean async)
   at Azure.Security.KeyVault.ChallengeBasedAuthenticationPolicy.AuthorizeRequestOnChallengeAsyncInternal(HttpMessage message, Boolean async)
   at Azure.Security.KeyVault.ChallengeBasedAuthenticationPolicy.AuthorizeRequestOnChallenge(HttpMessage message)
   at Azure.Core.Pipeline.BearerTokenAuthenticationPolicy.ProcessAsync(HttpMessage message, ReadOnlyMemory`1 pipeline, Boolean async)
   at Azure.Core.Pipeline.BearerTokenAuthenticationPolicy.Process(HttpMessage message, ReadOnlyMemory`1 pipeline)
   at Azure.Core.Pipeline.HttpPipelinePolicy.ProcessNext(HttpMessage message, ReadOnlyMemory`1 pipeline)
   at Azure.Core.Pipeline.RedirectPolicy.ProcessAsync(HttpMessage message, ReadOnlyMemory`1 pipeline, Boolean async)
   at Azure.Core.Pipeline.RedirectPolicy.Process(HttpMessage message, ReadOnlyMemory`1 pipeline)
   at Azure.Core.Pipeline.RetryPolicy.ProcessAsync(HttpMessage message, ReadOnlyMemory`1 pipeline, Boolean async)
   at Azure.Core.Pipeline.RetryPolicy.ProcessAsync(HttpMessage message, ReadOnlyMemory`1 pipeline, Boolean async)
   at Azure.Core.Pipeline.RetryPolicy.Process(HttpMessage message, ReadOnlyMemory`1 pipeline)
   at Azure.Core.Pipeline.HttpPipelinePolicy.ProcessNext(HttpMessage message, ReadOnlyMemory`1 pipeline)
   at Azure.Core.Pipeline.HttpPipelineSynchronousPolicy.Process(HttpMessage message, ReadOnlyMemory`1 pipeline)
   at Azure.Core.Pipeline.HttpPipelinePolicy.ProcessNext(HttpMessage message, ReadOnlyMemory`1 pipeline)
   at Azure.Core.Pipeline.HttpPipelineSynchronousPolicy.Process(HttpMessage message, ReadOnlyMemory`1 pipeline)
   at Azure.Core.Pipeline.HttpPipelinePolicy.ProcessNext(HttpMessage message, ReadOnlyMemory`1 pipeline)
   at Azure.Core.Pipeline.HttpPipelineSynchronousPolicy.Process(HttpMessage message, ReadOnlyMemory`1 pipeline)
   at Azure.Core.Pipeline.HttpPipeline.Send(HttpMessage message, CancellationToken cancellationToken)
   at Azure.Security.KeyVault.KeyVaultPipeline.SendRequest(Request request, CancellationToken cancellationToken)
   at Azure.Security.KeyVault.KeyVaultPipeline.SendRequest[TResult](RequestMethod method, Func`1 resultFactory, CancellationToken cancellationToken, String[] path)
   at Azure.Security.KeyVault.Secrets.SecretClient.GetSecret(String name, String version, CancellationToken cancellationToken)
   at Velocity.Akouba.Services.Config.KeyVaultConfigService.GetJwtSecret()