Fail to deploy .net core function app using az functionapp deployment source config-zip

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**Describe the bug**

When deploying a .net core function app to Azure Functions on Windows App Service Plan, the deployment fails if it requires changes in app settings.

There's a race condition here:

1. If the app settings are changed before or after the deployment is initiated, the build fails.
2. If the app settings are not changed before the deployment is initiated, the build succeeds.

**To Reproduce**

1. Create a .Net Core 2.2 Function App in Windows Standard App Service Plan
2. Prepare a simple function app content, and compress it into a zip file.
3. Run the command to change the appsettings az functionapp config appsettings set -n $functionAppName -g $resourceGroupName --settings APPINSIGHTS_INSTRUMENTATIONKEY=$instrumentationKey
4. Run the command az functionapp deployment source config-zip -g $resourceGroupName -n $functionAppName --src
5. Wait a while and will see the deployment failure error

**Expected behavior**

The deployment should succeed.

**Environment summary**

DevOps Hosted Agent: Ubuntu 16.04
Azure CLI Task
Shell Type: bash
CLI Version:
azure-cli 2.2.0

command-modules-nspkg 2.0.3
core 2.2.0
nspkg 3.0.4
telemetry 1.0.4

Extensions:
azure-devops 0.17.0

Python location '/opt/az/bin/python3'
Extensions directory '/opt/az/azcliextensions'

Python (Linux) 3.6.5 (default, Mar 6 2020, 14:41:35)
[GCC 5.4.0 20160609]

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**Additional context**