Discrepancy in Azure Function App Deployment Between Portal and PowerShell

Question

I encountered an issue while deploying a Function App in the East US region:

Issue with Azure Portal: Deployment failed with the error:

"The template deployment 'Microsoft.Web-FunctionApp-Portal-XXXXXXXX' is not valid according to the validation procedure. Code: ValidationForResourceFailed. This region has a quota of 0 instances for your subscription."

PowerShell Deployment: The same Function App deployment succeeded without any errors when using PowerShell. Both deployments used identical configurations, including:

• Runtime Stack: Java 11.0
  • Hosting Plan: Consumption (Dynamic SKU)
    • Region: East US
    Steps to Reproduce:

    1. Attempt to deploy a Function App in **East US** using the Azure Portal.
    
       1. Use the same settings to deploy the Function App using PowerShell (`New-AzFunctionApp`).
    
       **Expected Behavior**: The deployment should either succeed or fail consistently across both the Azure Portal and PowerShell.
    

---

Request:

Please investigate the following:

1. Why the Azure Portal fails the deployment with a quota error, but PowerShell succeeds?
2. Is this a bug in the Portal validation process, or is there a hidden quota difference in how these tools operate?

Awaiting response