Unable to deploy Logic App resource due to "'$schema' not found in JSON" issue

Describe the bug

I’m unable to create a Logic App resource even after I literally used the “Export Template” option in the Logic App portal. I can see that there is a ‘$schema’ in the template.json file that I’m trying to use for the deployment

(azuredev) [master ?] ~/Workspace/DevSentinel/Playbooks/Playbook5  $ head -n 3 template.json
{
"$schema": "https://schema.management.azure.com/schemas/2015-01-01/deploymentTemplate.json#",
    "contentVersion": "1.0.0.0",

Command Name az deployment group create

Errors:

Deployment failed. Correlation ID: df10f68f-54e1-438b-bb57-e69f49ca705d. {
  "error": {
    "code": "InvalidRequestContent",
    "message": "The request content is not valid and could not be deserialized: 'Required property '$schema' not found in JSON. Path 'properties.definition', line 1, position 69.'."
  }
}

To Reproduce:

Steps to reproduce the behavior. Note that argument values have been redacted, as they may contain sensitive information.

• Put any pre-requisite steps here…
• az deployment group create -g RedactedRG1 --name Playbook5 --template-file template.json

Expected Behavior

I expected it to be successfully deployed since I had just literally downloaded the deployment template from the portal

Environment Summary

Darwin-19.4.0-x86_64-i386-64bit
Python 3.7.5

azure-cli 2.2.0 *

Additional Context

[zhoxing-ms]

In fact, this issue may be related to the deployment service of the workflows resource:

1. The template provided by customer can pass the verification with rest API Deployments - Validate
2. When the template is deployed with rest API Deployments - Create Or Update, the following error is reported:

The request content is not valid and could not be deserialized: ‘Required property ‘$schema’ not found in JSON. Path ‘properties.definition’, line 1, position 69.’

1. Replace the resources of Microsoft.Logic/workflows in the ARM template with other resources, the template will be normally deployed. This shows that the format of the template is correct.

This issue requires the service team to see if there is a problem with the deployment service of resource Microsoft.Logic/workflows. Correlation ID: 5af650fb-d96c-49dc-ab9b-b9c25f023648.

[mostlycached]

I can no longer repro. Looks like the Azure Sentinel UI has reverted to an older schema that no longer has this issue