AzureWebJobsScriptRoot variable is not defined on Azure Functions

[PingPongSet]

AzureWebJobsScriptRoot variable is not defined on Azure Functions. The code below returns no value.
System.Environment.GetEnvironmentVariables(EnvironmentVariableTarget.Process)["AzureWebJobsScriptRoot"];

However, %HOME%\site\wwwroot will be returned based on below:

AzureWebJobsScriptRoot

AzureWebJobsScriptRoot

The path to the root directory where the host.json file and function folders are located. In a function app, the default is %HOME%\site\wwwroot.
Key Sample value
AzureWebJobsScriptRoot %HOME%\site\wwwroot

It returns correct value locally, not %HOME%\site\wwwroot

Update

Is this a bug with Azure Functions?

If so, what is an alternative solution?

Before the issue is fixed by Microsoft, can this variable, AzureWebJobsScriptRoot, be defined myself to "%HOME%\site\wwwroot" on Azure?

[ColbyTresness]

@brettsam to take a look

[KetanChawda-MSFT]

Possibly duplicate of this doc issue. MicrosoftDocs/azure-docs#26761

[ColbyTresness]

Yeah this is a dupe, leaving on other issue until a verdict is reached there as to whether there's anything to fix.