Log Download from Azure Fails #2522

I've deployed my application to Azure and all seems to work well except when I try to download all logs (from Admin, Maintenance). This works fine running locally but from Azure it fails with an internal error and the following showing in the log.

2017-02-22 00:48:19,924 [38 ] nHandling.AbpApiExceptionFilterAttribute - size was 3375666, but I expected 3375256
ICSharpCode.SharpZipLib.Zip.ZipException: size was 3375666, but I expected 3375256
at ICSharpCode.SharpZipLib.Zip.ZipOutputStream.CloseEntry()
at ICSharpCode.SharpZipLib.Zip.ZipOutputStream.Finish()
at ICSharpCode.SharpZipLib.Zip.Compression.Streams.DeflaterOutputStream.Close()
at System.IO.Stream.Dispose()
at Cybertron.Sched.Logging.WebLogAppService.DownloadWebLogs()
at Castle.Proxies.WebLogAppServiceProxy.DownloadWebLogs_callback()
at Castle.Proxies.Invocations.IWebLogAppService_DownloadWebLogs.InvokeMethodOnTarget()
at Castle.DynamicProxy.AbstractInvocation.Proceed()
at Abp.Authorization.AuthorizationInterceptor.Intercept(IInvocation invocation)
at Castle.DynamicProxy.AbstractInvocation.Proceed()
at Abp.Domain.Uow.UnitOfWorkInterceptor.PerformSyncUow(IInvocation invocation, UnitOfWorkOptions options)
at Abp.Domain.Uow.UnitOfWorkInterceptor.PerformUow(IInvocation invocation, UnitOfWorkOptions options)
at Abp.Domain.Uow.UnitOfWorkInterceptor.Intercept(IInvocation invocation)
at Castle.DynamicProxy.AbstractInvocation.Proceed()
at Abp.Auditing.AuditingInterceptor.PerformSyncAuditing(IInvocation invocation, AuditInfo auditInfo)
at Abp.Auditing.AuditingInterceptor.Intercept(IInvocation invocation)
at Castle.DynamicProxy.AbstractInvocation.Proceed()
at Abp.Runtime.Validation.Interception.ValidationInterceptor.Intercept(IInvocation invocation)
at Castle.DynamicProxy.AbstractInvocation.Proceed()
at Castle.Proxies.WebLogAppServiceProxy.DownloadWebLogs()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at Abp.WebApi.Controllers.Dynamic.Interceptors.AbpDynamicApiControllerInterceptor`1.Intercept(IInvocation invocation)
at Castle.DynamicProxy.AbstractInvocation.Proceed()
at Castle.Proxies.DynamicApiController`1Proxy_20.DownloadWebLogs()
at lambda_method(Closure , Object , Object[] )
at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.<>c__DisplayClass10.<GetExecutor>b__9(Object instance, Object[] methodParameters)
at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.Execute(Object instance, Object[] arguments)
at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ExecuteAsync(HttpControllerContext controllerContext, IDictionary`2 arguments, CancellationToken cancellationToken)
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Web.Http.Controllers.ApiControllerActionInvoker.&lt;InvokeActionAsyncCore&gt;d__0.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Abp.WebApi.Uow.AbpApiUowFilter.&lt;ExecuteActionFilterAsync&gt;d__5.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Abp.WebApi.Validation.AbpApiValidationFilter.&lt;ExecuteActionFilterAsync&gt;d__5.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Abp.WebApi.Auditing.AbpApiAuditFilter.&lt;ExecuteActionFilterAsync&gt;d__4.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Web.Http.Controllers.ActionFilterResult.&lt;ExecuteAsync&gt;d__2.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Abp.WebApi.Security.AntiForgery.AbpAntiForgeryApiFilter.&lt;ExecuteAuthorizationFilterAsync&gt;d__10.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Abp.WebApi.Authorization.AbpApiAuthorizeFilter.&lt;ExecuteAuthorizationFilterAsync&gt;d__7.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Web.Http.Controllers.AuthenticationFilterResult.&lt;ExecuteAsync&gt;d__0.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Web.Http.Controllers.ExceptionFilterResult.&lt;ExecuteAsync&gt;d__0.MoveNext()e

Any ideas what is going wrong? Thanks.