Azure Function strange shutdown runtime vs worker

#### Is your question related to a specific version? If so, please specify:
Version=4.14.0.0

#### What language does your question apply to? (e.g. C#, JavaScript, Java, All)
C#

#### Question
When running my Azure function in kubernetes the Azure Functon runtime gives up after about 50 seconds
and the dotnet-isolated worker keeps trying to restart and succeeds after about 1 minute. The problem is since
that runtime has already given up no messages will be processed and the host will just idle instead of shutting down.
Can you control the timeout in some way? Should this be reported as a bug?

See the log for more detailed info.

[storepagesmsosync-69cf746885-r6nlt.log](https://github.com/Azure/azure-functions-host/files/10579734/storepagesmsosync-69cf746885-r6nlt.log)