Cannot run 64bit C# Azure Function on Azure Kubernetes Service

Please describe the documentation request or issue. Be as specific as possible.
I am working on an V2 Azure Function App that uses C# and .NET core that uses an x64 dll. For this reason I have set it up to only build and run as x64. I am able to run this function locally using 64 bit Azure Function Core tools and everything works as expected.

I deploy this to azure kubernetes using:
`func deploy --platform kubernetes --name MyFunctionName --registry nickjpurcell`
The deployment seems to succeed but when it has to run the code dependent on the x64 dll it fails.
I am ensuring we are publishing the project as x64 in the Dockerfile `dotnet publish -p:Platform=x64 *.csproj --output /home/site/wwwroot`.

Do I need to change the version of azure function I am using?
Is there a configuration I can do to switch the function runtime to use a 64 worker process?
(That is not the azure portal ui?)

Here is the [gist](https://gist.github.com/SpicySyntax/5c8484e3505ec5e753e787344bb389ea) containing the .csproj, Dockerfile, host.json for my Azure Function V2 project.