Error en flujo: System.ObjectDisposedException: The ObjectContext instance has been disposed and can no longer be used for operations that require a connection [Evolution 1.11.0.2]

Tengo el siguiente error al finalizar un flujo de autorización:

2017-11-27 09:43:11,890 [9] INFO  Aseinfo.VH4.WorkflowServices.Activities.LogMessage - Ocurrió un error y se terminará la instancia e6e292d4-936d-44a8-b4db-1de61810bc1a
2017-11-27 09:43:11,905 [9] ERROR Aseinfo.VH4.WorkflowServices.Activities.LogException - Se dió un error en la ejecución del workflow 69c5ec73-e238-4964-87e6-464a8fab0166
Aseinfo.Infrastructure.Base.Exceptions.AuthorizationWorkflowException: Sucedio un error en el flujo. Se está logueando el exception interno y luego se logueará el que terminará la instancia ---> System.ObjectDisposedException: The ObjectContext instance has been disposed and can no longer be used for operations that require a connection.
   at System.Data.Entity.Core.Objects.ObjectContext.ReleaseConnection()
   at System.Data.Entity.Core.Common.Internal.Materialization.Shaper`1.Finally()
   at System.Data.Entity.Core.Common.Internal.Materialization.Shaper`1.ObjectQueryNestedEnumerator.Dispose()
   at System.Data.Entity.Internal.LazyEnumerator`1.Dispose()
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at System.Data.Entity.Core.Objects.CompiledQuery.ExecuteQuery[TResult](ObjectContext context, Object[] parameterValues)
   at System.Data.Entity.Core.Objects.CompiledQuery.Invoke[TArg0,TArg1,TArg2,TResult](TArg0 arg0, TArg1 arg1, TArg2 arg2)
   at Aseinfo.Infrastructure.Common.Data.LocalizationDatabaseRepositoryBase.DatabaseSearch(ConfigDataContext configDataContext, CultureInfo culture, String area, String key) in C:\vh4\Infrastructure\Common\Localization\LocalizationDatabaseRepositoryBase.cs:line 64
   at Aseinfo.Infrastructure.Common.Data.LocalizationCachedDatabaseRepository.Search(String key, String area, CultureInfo culture) in C:\vh4\Infrastructure\Common\Localization\LocalizationCachedDatabaseRepository.cs:line 69
   at Aseinfo.Infrastructure.Common.LocalizationService.GetLocalized(String key, String area, Stack`1 localizedKeysStack, CultureInfo culture) in C:\vh4\Infrastructure\Common\Localization\LocalizationService.cs:line 412
   at Aseinfo.Infrastructure.Common.LocalizationService.GetLocalized(String key, String area, CultureInfo culture) in C:\vh4\Infrastructure\Common\Localization\LocalizationService.cs:line 214
   at Aseinfo.VH4.WorkflowServices.Services.AuthorizationWorkflowService.GeneraMensajeNotificacion(InstanciaRutaAutorizacion instancia, ActividadAutorizacionInstancia actividad, Empleo responsable, String mensaje, Exception exception, Empleo empleoSustituido) in C:\vh4\VH4\WorkflowServices\WorkflowServices\Services\AuthorizationWorkflowService.cs:line 1293
   at Aseinfo.VH4.WorkflowServices.Services.AuthorizationWorkflowService.EnviarRecordatorioActividad(Int32 codigoActividad) in C:\vh4\VH4\WorkflowServices\WorkflowServices\Services\AuthorizationWorkflowService.cs:line 537
   at Aseinfo.VH4.WorkflowServices.Services.AuthorizationWorkflowStaticService.EnviarRecordatorioActividad(Int32 codigoActividad, WorkflowContext context) in C:\vh4\VH4\WorkflowServices\WorkflowServices\Services\AuthorizationWorkflowStaticService.cs:line 138
   --- End of inner exception stack trace ---
   at System.Activities.Statements.MethodExecutor.InvokeAndUnwrapExceptions(Func`3 func, Object targetInstance, Object[] actualParameters)
   at System.Activities.Statements.MethodResolver.SyncMethodExecutor.BeginMakeMethodCall(AsyncCodeActivityContext context, Object target, AsyncCallback callback, Object state)
   at System.Activities.Statements.MethodExecutor.BeginExecuteMethod(AsyncCodeActivityContext context, AsyncCallback callback, Object state)
   at System.Activities.AsyncCodeActivity.InternalExecute(ActivityInstance instance, ActivityExecutor executor, BookmarkManager bookmarkManager)
   at System.Activities.Runtime.ActivityExecutor.ExecuteActivityWorkItem.ExecuteBody(ActivityExecutor executor, BookmarkManager bookmarkManager, Location resultLocation)
2017-11-27 09:43:11,905 [14] INFO  ASP.global_asax - Iniciando la construcción del Unity ChildContainer
2017-11-27 09:43:11,905 [9] INFO  ASP.global_asax - Iniciando la construcción del Unity ChildContainer
2017-11-27 09:43:11,905 [10] ERROR Aseinfo.VH4.WorkflowServices.Activities.LogException - Se dió un error en la ejecución del workflow 74671b1d-c362-4f03-a4e3-e880e4732d6e
Aseinfo.Infrastructure.Base.Exceptions.AuthorizationWorkflowException: Sucedio un error en el flujo. Se está logueando el exception interno y luego se logueará el que terminará la instancia ---> System.ObjectDisposedException: The ObjectContext instance has been disposed and can no longer be used for operations that require a connection.
   at System.Data.Entity.Core.Objects.ObjectContext.get_Connection()
   at System.Data.Entity.Core.Objects.ObjectQuery`1.GetResults(Nullable`1 forMergeOption)
   at System.Data.Entity.Core.Objects.ObjectQuery`1.<system.collections.generic.ienumerable<t>.GetEnumerator>b__0()
   at System.Data.Entity.Internal.LazyEnumerator`1.MoveNext()
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at System.Data.Entity.Core.Objects.CompiledQuery.ExecuteQuery[TResult](ObjectContext context, Object[] parameterValues)
   at System.Data.Entity.Core.Objects.CompiledQuery.Invoke[TArg0,TArg1,TArg2,TResult](TArg0 arg0, TArg1 arg1, TArg2 arg2)
   at Aseinfo.Infrastructure.Common.Data.LocalizationDatabaseRepositoryBase.DatabaseSearch(ConfigDataContext configDataContext, CultureInfo culture, String area, String key) in C:\vh4\Infrastructure\Common\Localization\LocalizationDatabaseRepositoryBase.cs:line 64
   at Aseinfo.Infrastructure.Common.Data.LocalizationCachedDatabaseRepository.Search(String key, String area, CultureInfo culture) in C:\vh4\Infrastructure\Common\Localization\LocalizationCachedDatabaseRepository.cs:line 69
   at Aseinfo.Infrastructure.Common.LocalizationService.GetLocalized(String key, String area, Stack`1 localizedKeysStack, CultureInfo culture) in C:\vh4\Infrastructure\Common\Localization\LocalizationService.cs:line 412
   at Aseinfo.Infrastructure.Common.LocalizationService.GetLocalized(String key, String area, CultureInfo culture) in C:\vh4\Infrastructure\Common\Localization\LocalizationService.cs:line 214
   at Aseinfo.VH4.WorkflowServices.Services.AuthorizationWorkflowService.GeneraMensajeNotificacion(InstanciaRutaAutorizacion instancia, ActividadAutorizacionInstancia actividad, Empleo responsable, String mensaje, Exception exception, Empleo empleoSustituido) in C:\vh4\VH4\WorkflowServices\WorkflowServices\Services\AuthorizationWorkflowService.cs:line 1293
   at Aseinfo.VH4.WorkflowServices.Services.AuthorizationWorkflowService.EnviarRecordatorioActividad(Int32 codigoActividad) in C:\vh4\VH4\WorkflowServices\WorkflowServices\Services\AuthorizationWorkflowService.cs:line 537
   at Aseinfo.VH4.WorkflowServices.Services.AuthorizationWorkflowStaticService.EnviarRecordatorioActividad(Int32 codigoActividad, WorkflowContext context) in C:\vh4\VH4\WorkflowServices\WorkflowServices\Services\AuthorizationWorkflowStaticService.cs:line 138
   --- End of inner exception stack trace ---
   at System.Activities.Statements.MethodExecutor.InvokeAndUnwrapExceptions(Func`3 func, Object targetInstance, Object[] actualParameters)
   at System.Activities.Statements.MethodResolver.SyncMethodExecutor.BeginMakeMethodCall(AsyncCodeActivityContext context, Object target, AsyncCallback callback, Object state)
   at System.Activities.Statements.MethodExecutor.BeginExecuteMethod(AsyncCodeActivityContext context, AsyncCallback callback, Object state)
   at System.Activities.AsyncCodeActivity.InternalExecute(ActivityInstance instance, ActivityExecutor executor, BookmarkManager bookmarkManager)
   at System.Activities.Runtime.ActivityExecutor.ExecuteActivityWorkItem.ExecuteBody(ActivityExecutor executor, BookmarkManager bookmarkManager, Location resultLocation)
2017-11-27 09:43:11,921 [10] INFO  ASP.global_asax - Iniciando la construcción del Unity ChildContainer
2017-11-27 09:43:11,999 [14] INFO  ASP.global_asax - Fin de la construcción del Unity ChildContainer
2017-11-27 09:43:11,999 [14] INFO  Aseinfo.VH4.WorkflowServices.Services.AuthorizationWorkflowService - TerminarInstancia: 2b307203-d2d3-4a48-a647-df11e963552d 
Exception:Aseinfo.Infrastructure.Base.Exceptions.AuthorizationWorkflowException: Sucedio un error en el flujo. Se está logueando el exception interno y luego se logueará el que terminará la instancia ---> System.Data.Entity.Core.EntityCommandExecutionException: An error occurred while executing the command definition. See the inner exception for details. ---> System.InvalidOperationException: There is already an open DataReader associated with this Command which must be closed first.
   at System.Data.SqlClient.SqlInternalConnectionTds.ValidateConnectionForExecute(SqlCommand command)
   at System.Data.SqlClient.SqlCommand.ValidateCommand(String method, Boolean async)
   at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, TaskCompletionSource`1 completion, Int32 timeout, Task& task, Boolean& usedCache, Boolean asyncWrite, Boolean inRetry)
   at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method)
   at System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior behavior, String method)
   at System.Data.Entity.Infrastructure.Interception.InternalDispatcher`1.Dispatch[TTarget,TInterceptionContext,TResult](TTarget target, Func`3 operation, TInterceptionContext interceptionContext, Action`3 executing, Action`3 executed)
   at System.Data.Entity.Infrastructure.Interception.DbCommandDispatcher.Reader(DbCommand command, DbCommandInterceptionContext interceptionContext)
   at System.Data.Entity.Core.EntityClient.Internal.EntityCommandDefinition.ExecuteStoreCommands(EntityCommand entityCommand, CommandBehavior behavior)
   --- End of inner exception stack trace ---
   at System.Data.Entity.Core.EntityClient.Internal.EntityCommandDefinition.ExecuteStoreCommands(EntityCommand entityCommand, CommandBehavior behavior)
   at System.Data.Entity.Core.Objects.Internal.ObjectQueryExecutionPlan.Execute[TResultType](ObjectContext context, ObjectParameterCollection parameterValues)
   at System.Data.Entity.Core.Objects.ObjectContext.ExecuteInTransaction[T](Func`1 func, IDbExecutionStrategy executionStrategy, Boolean startLocalTransaction, Boolean releaseConnectionOnSuccess)
   at System.Data.Entity.Core.Objects.ObjectQuery`1.<>c__DisplayClass7.<getresults>b__5()
   at System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute[TResult](Func`1 operation)
   at System.Data.Entity.Core.Objects.ObjectQuery`1.GetResults(Nullable`1 forMergeOption)
   at System.Data.Entity.Core.Objects.ObjectQuery`1.<system.collections.generic.ienumerable<t>.GetEnumerator>b__0()
   at System.Data.Entity.Internal.LazyEnumerator`1.MoveNext()
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at Aseinfo.Infrastructure.Base.Entity.EntityServiceBase`2.GetEntityById(IdT id, Expression`1[] includes) in C:\vh4\Infrastructure\Base\Entity\EntityServiceBase.cs:line 310
   at Aseinfo.VH4.WorkflowServices.Services.AuthorizationWorkflowService.GeneraMensajeNotificacion(InstanciaRutaAutorizacion instancia, ActividadAutorizacionInstancia actividad, Empleo responsable, String mensaje, Exception exception, Empleo empleoSustituido) in C:\vh4\VH4\WorkflowServices\WorkflowServices\Services\AuthorizationWorkflowService.cs:line 1356
   at Aseinfo.VH4.WorkflowServices.Services.AuthorizationWorkflowService.NotificaActividadInstancia(Int32 codigoActividad, String username) in C:\vh4\VH4\WorkflowServices\WorkflowServices\Services\AuthorizationWorkflowService.cs:line 385
   at Aseinfo.VH4.WorkflowServices.Services.AuthorizationWorkflowStaticService.NotificaActividadInstancia(Int32 codigoActividad, String username, WorkflowContext context) in C:\vh4\VH4\WorkflowServices\WorkflowServices\Services\AuthorizationWorkflowStaticService.cs:line 54
   --- End of inner exception stack trace ---
   at System.Activities.Statements.MethodExecutor.InvokeAndUnwrapExceptions(Func`3 func, Object targetInstance, Object[] actualParameters)
   at System.Activities.Statements.MethodResolver.SyncMethodExecutor.BeginMakeMethodCall(AsyncCodeActivityContext context, Object target, AsyncCallback callback, Object state)
   at System.Activities.Statements.MethodExecutor.BeginExecuteMethod(AsyncCodeActivityContext context, AsyncCallback callback, Object state)
   at System.Activities.AsyncCodeActivity.InternalExecute(ActivityInstance instance, ActivityExecutor executor, BookmarkManager bookmarkManager)
   at System.Activities.Runtime.ActivityExecutor.ExecuteActivityWorkItem.ExecuteBody(ActivityExecutor executor, BookmarkManager bookmarkManager, Location resultLocation)