[REGRESSION]: ERROR: Usage error: --container-name is required when adding or updating a container

[MMouad-FM]

New issue checklist

• I searched for existing GitHub issues
• I read pipeline troubleshooting guide
• I checked how to collect logs

Task name

AzureContainerApps

Breaking task version

1.255.0

Last working task version

1.247.1

Regression Description

The task id no longer fomatting the AZ command correctly,

We get the error below (while using the same task params):

/usr/bin/az containerapp update -n ca-mgt-lz-t-weur-001 -g rg-mgt-lzautomation-t-weur -i cravrlzdweur001.azurecr.io/ado-task/container-app:13557.20250417.1
ERROR: Usage error: --container-name is required when adding or updating a container
##[error]Error Code: [1]
##[error]Error: Unable to update Azure Container App via 'az containerapp update' command.

Thanks.

Environment type (Please select at least one enviroment where you face this issue)

• Self-Hosted
• Microsoft Hosted
• VMSS Pool
• Container

Azure DevOps Server type

dev.azure.com (formerly visualstudio.com)

Azure DevOps Server Version (if applicable)

No response

Operation system

Ubuntu 24.04.2 LTS (ubuntu-latest)

Relevant log output

/usr/bin/az containerapp update -n ca-mgt-lz-t-weur-001 -g rg-mgt-lzautomation-t-weur -i cravrlzdweur001.azurecr.io/ado-task/container-app:13557.20250417.1
ERROR: Usage error: --container-name is required when adding or updating a container
##[error]Error Code: [1]
##[error]Error: Unable to update Azure Container App via 'az containerapp update' command.

Full task logs with system.debug enabled

UNSUCCESSFUL RUN

 [REPLACE THIS WITH YOUR INFORMATION] 

SUCCESSFUL RUN

 [REPLACE THIS WITH YOUR INFORMATION] 

Repro steps

pool:
  vmImage: 'ubuntu-latest'

steps:
- task: AzureContainerApps@1
  inputs:
    appSourcePath: '$(Build.SourcesDirectory)'
    azureSubscription: '{armServiceConnection}'
    acrName: '{acrName}'
    acrUsername: '{acrUserName}'
    acrPassword: '{acrPwd}'
    containerAppName: '{containerApp}'
    resourceGroup: '{rgName}'
    containerAppEnvironment: '{containerAppEnvName}'
    location: 'West Europe'

[v-schhabra]

Hi @cormacpayne @daniv-msft
Could you please check these issues which we received for AzureContainerApp?