Just sharing the following details to help you isolate in the meanwhile I connect with you offline.
Service Health - Service issues view shows any ongoing problems in Azure services that are impacting your resources. You can understand when the issue began, and what services and regions are impacted. You can also read the most recent update to understand what Azure is doing to resolve the issue.
Resource health- helps you diagnose and get support when an Azure issue impacts your resources. It informs you about the current and past health of your resources and helps you mitigate issues. Resource health provides technical support when you need help with Azure service issues.
Kindly see these docs:
OS and runtime patching in Azure App Service
App Service update cycle