Application Insights not being updated after releasing new version of .NET Framework app service

I released a new version of .NET Framework Web API to an Azure app service and the telemetry reported to Application Insights on Azure has drastically reduced. The app appears to be running fine but a lot of the requests previously being logged are no longer being shown.

I have the health check turned on and those request used to be logged. They are still being sent but are no longer shown in Application Insights.

Is there a configuration setting I should be looking for?