@Bob_M we are sorry to hear you're this issue. Are you still experiencing this issue?
It might be an authentication issue were your Web Apps might trouble authenticating with the container registry despite successful WebHooks ping responses OR a network restriction in East 2 could be preventing Web Apps from accessing the container registry. Is the Azure Container Registry using Public Access or Private Endpoints?
To troubleshoot: please double-check the container registry credentials used by the Web Apps. Consider using the "private registry" tab in the container settings instead of relying on ACR integration. Provide your ACR credentials directly in the Web App configuration.
Also, explore using Azure DevOps pipelines or other CI/CD tools to automate deployments. These tools can trigger deployments based on code changes or image pushes.
Best,
Grace