Access to disposed logger factory exception stops scaling of function app.

We have a consumption plan function app that has been working fine for a year. In the past two weeks we have seen huge spikes in "System.ObjectDisposedException at Microsoft.Extensions.Logging.LoggerFactory.CreateLogger". After each spike, the azure functions will no longer scale and will be stuck at one instance. The issue is resolved by stopping and starting the app.

FUNCTIONS_EXTENSION_VERSION ~1

prop__InvocationId | 62abc885-ff81-4884-a3b1-00e85d69bc1c
Event time | 2/19/2019, 4:33:18 PM
East US

```
Microsoft.Azure.WebJobs.Host.FunctionInvocationException:
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089)
at Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor+d__16.MoveNext (Microsoft.Azure.WebJobs.Host, Version=2.4.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35)
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089)
at Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor+d__13.MoveNext (Microsoft.Azure.WebJobs.Host, Version=2.4.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35)
Inner exception System.InvalidOperationException handled at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw:
at Microsoft.Azure.WebJobs.Host.Executors.DelayedException.Throw (Microsoft.Azure.WebJobs.Host, Version=2.4.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35)
at Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor+d__23.MoveNext (Microsoft.Azure.WebJobs.Host, Version=2.4.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35)
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089)
at Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor+d__22.MoveNext (Microsoft.Azure.WebJobs.Host, Version=2.4.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35)
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089)
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089)
at Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor+d__16.MoveNext (Microsoft.Azure.WebJobs.Host, Version=2.4.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35)
Inner exception System.ObjectDisposedException handled at Microsoft.Azure.WebJobs.Host.Executors.DelayedException.Throw:
at Microsoft.Extensions.Logging.LoggerFactory.CreateLogger (Microsoft.Extensions.Logging, Version=1.1.1.0, Culture=neutral, PublicKeyToken=adb9793829ddae60)
at Microsoft.Azure.WebJobs.Host.Bindings.TraceWriterBinding.BindAsync (Microsoft.Azure.WebJobs.Host, Version=2.4.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35)
at Microsoft.Azure.WebJobs.Script.Binding.FunctionTraceBinderProvider+Wrapper+WrapperBinding+d__7.MoveNext (Microsoft.Azure.WebJobs.Script, Version=1.0.0.0, Culture=neutral, PublicKeyToken=nullMicrosoft.Azure.WebJobs.Script, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null: C:\projects\azure-webjobs-sdk-script\src\WebJobs.Script\Binding\FunctionTraceBinderProvider.csMicrosoft.Azure.WebJobs.Script, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null: 98)
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089)
at Microsoft.Azure.WebJobs.Host.Triggers.TriggeredFunctionBinding`1+d__8.MoveNext (Microsoft.Azure.WebJobs.Host, Version=2.4.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35)
```