ApplicationInsights-dotnet: AI (Internal) Errors when using version 2.8.0 or 2.8.1 in Azure Functions

When using TelemetryClient in an Azure Function, AI internal errors are added in application insights. This does not occur when downgrading to 2.7.2.

Repro Steps

1. Create a Function App with Application Insights enabled in Azure
2. Create a queue ‘trigger-test’ in the storage account that is created with the function app
3. Create an Azure Function in Visual Studio 2017

[FunctionName("Function1")]
public static void Run([QueueTrigger("trigger-test", Connection = "AzureWebJobsStorage")]string message, ILogger log, ExecutionContext context)
{
        var config = new ConfigurationBuilder()
	.SetBasePath(context.FunctionAppDirectory)
	.AddJsonFile("local.settings.json", true, true)
	.AddEnvironmentVariables()
	.Build();

	log.LogInformation($"Starting {message}");
	var telemetryClient = new TelemetryClient(TelemetryConfiguration.Active);
        log.LogInformation("Created tel client");
}

Project file:

<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
    <TargetFramework>netcoreapp2.1</TargetFramework>
    <AzureFunctionsVersion>v2</AzureFunctionsVersion>
  </PropertyGroup>
  <ItemGroup>
    <PackageReference Include="Microsoft.ApplicationInsights" Version="2.8.1" />
    <PackageReference Include="Microsoft.NET.Sdk.Functions" Version="1.0.23" />
	  <PackageReference Include="Microsoft.Azure.WebJobs" Version="3.0.0" />
	  <PackageReference Include="Microsoft.Azure.WebJobs.Extensions.ServiceBus" Version="3.0.0" />
	  <PackageReference Include="Microsoft.Azure.WebJobs.ServiceBus" Version="2.2.0" />
	  <PackageReference Include="Microsoft.Azure.WebJobs.Extensions.Storage" Version="3.0.0" />	
  </ItemGroup>
  <ItemGroup>
    <None Update="host.json">
      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
    </None>
    <None Update="local.settings.json">
      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
      <CopyToPublishDirectory>Never</CopyToPublishDirectory>
    </None>
  </ItemGroup>
</Project>

1. Publish the function to the Function app
2. Add a message to the trigger-test queue
3. Check application insights

Actual Behavior

Traces with AI Internal Errors: AI (Internal): ERROR: Exception in Command Processing for EventSource Microsoft-ApplicationInsights-Core: An instance of EventSource with Guid 74af9f20-af6a-5582-9382-f21f674fb271 already exists. and AI (Internal): ERROR: Exception in Command Processing for EventSource Microsoft-ApplicationInsights-Core: Object reference not set to an instance of an object.

Expected Behavior

No AI internal errors

Version Info

Azure Function runtime version: 2.0.12134.0 (~2) .NET Version : .NET Core 2.1