SqlClient: Intermittent enclave session error using Always Encrypted w/ secure enclaves.

Microsoft.Data.SqlClient.EnclaveDelegate+RetryableEnclaveQueryExecutionException: Internal Error. Enclave session is null during query execution. Enclave type is 'SGX' and enclaveAttestationUrl is 'https://xxxxxxxxxxxxx.eus.attest.azure.net'.
 ---> System.ArgumentException: Internal Error. Enclave session is null during query execution. Enclave type is 'SGX' and enclaveAttestationUrl is 'https://xxxxxxxxxxxxx.eus.attest.azure.net'.
   at Microsoft.Data.SqlClient.EnclaveDelegate.GetEnclaveSession(SqlConnectionAttestationProtocol attestationProtocol, String enclaveType, EnclaveSessionParameters enclaveSessionParameters, Boolean generateCustomData, SqlEnclaveSession& sqlEnclaveSession, Int64& counter, Byte[]& customData, Int32& customDataLength, Boolean throwIfNull)
   at Microsoft.Data.SqlClient.EnclaveDelegate.GenerateEnclavePackage(SqlConnectionAttestationProtocol attestationProtocol, ConcurrentDictionary`2 keysToBeSentToEnclave, String queryText, String enclaveType, EnclaveSessionParameters enclaveSessionParameters, SqlConnection connection, SqlCommand command)
   --- End of inner exception stack trace ---
   at Microsoft.Data.SqlClient.EnclaveDelegate.GenerateEnclavePackage(SqlConnectionAttestationProtocol attestationProtocol, ConcurrentDictionary`2 keysToBeSentToEnclave, String queryText, String enclaveType, EnclaveSessionParameters enclaveSessionParameters, SqlConnection connection, SqlCommand command)
   at Microsoft.Data.SqlClient.SqlCommand.GenerateEnclavePackage()
   at Microsoft.Data.SqlClient.SqlCommand.RunExecuteReaderTdsWithTransparentParameterEncryption(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean isAsync, Int32 timeout, Task& task, Boolean asyncWrite, Boolean inRetry, SqlDataReader ds, Boolean describeParameterEncryptionRequest, Task describeParameterEncryptionTask)
   at Microsoft.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, TaskCompletionSource`1 completion, Int32 timeout, Task& task, Boolean& usedCache, Boolean asyncWrite, Boolean inRetry, String method)
   at Microsoft.Data.SqlClient.SqlCommand.BeginExecuteReaderInternal(CommandBehavior behavior, AsyncCallback callback, Object stateObject, Int32 timeout, Boolean inRetry, Boolean asyncWrite)
   at Microsoft.Data.SqlClient.SqlCommand.BeginExecuteReaderAsyncCallback(AsyncCallback callback, Object stateObject)
   at System.Threading.Tasks.TaskFactory`1.FromAsyncImpl(Func`3 beginMethod, Func`2 endFunction, Action`1 endAction, Object state, TaskCreationOptions creationOptions)
   at Microsoft.Data.SqlClient.SqlCommand.InternalExecuteReaderAsync(CommandBehavior behavior, CancellationToken cancellationToken)

To Reproduce Behavior occurs intermittently with any command that references an encrypted column.

Further technical details Microsoft.Data.SqlClient version: 4.0.0 .NET.Core 3.1 AzureSQL Attestation Protocol: AAS