[BUG][Resource Graph] Resource Graph API returns inconsistent casing for the resource group name in the 'id' field when query the resources with type Microsoft.CognitiveServices/accounts

[ChenxiJiang333]

API Spec link

https://github.com/Azure/azure-rest-api-specs/blob/main/specification/resourcegraph/resource-manager/Microsoft.ResourceGraph/stable/2024-04-01/resourcegraph.json#L37

API Spec version

2024-04-01

Describe the bug

The casing of the 'id' field is being inconsistently returned when query the resources with type Microsoft.CognitiveServices/accounts with Resource Graph API, when it contains upper case letters.
For example, using a resource group named 'BA-Test', firstly the 'id' field is returned with this in mixed case (/resourceGroups/BA-Test/) and after deploy a model in the AI Service, it would become lower case (/resourceGroups/ba-test/).

Expected behavior

Response to have consistent casing for the resource group in the 'id' field, every time, preferably the mixed casing to match the console.

Actual behavior

Resource group name in the 'id' field in the response would turn into lower case once deploy a model in the AI Service and turn back to mixed case once the deployed model removed.

Reproduction Steps

API: https://learn.microsoft.com/en-us/rest/api/azureresourcegraph/resourcegraph/resources/resources?view=rest-azureresourcegraph-resourcegraph-2024-04-01
Request body: "query": "Resources | project id, name, type, resourceGroup | where type =~ 'Microsoft.CognitiveServices/accounts'"
Steps:

1. Create an Azure AI Services resource in the console using a mixed case resource group (for example BA-Test)

2. Call the api and the print out for the relevant resource will (most likely) be:

   /subscriptions/my-sub-id/resourceGroups/BA-Test/providers/Microsoft.CognitiveServices/accounts/casing-test
   ba-test

3. Navigate to AI Studio from this resource and deploy a model (i used gpt-4). Then call the api with same body and response is likely to be:

   /subscriptions/my-sub-id/resourceGroups/ba-test/providers/Microsoft.CognitiveServices/accounts/casing-test
   ba-test

Environment

No response

[microsoft-github-policy-service]

Thanks for the feedback! We are routing this to the appropriate team for follow-up. cc @chiragg4u.