In Application Insights(Azure) under failures, there is a failed request for GET /robots933456.txt with 404 response. I am not making this request, but it pops up in my failures. This requests happens randomly, maybe once a week or biweekly.
Can someone help me with this.
You can safely ignore this message. /robots933456.txt is a dummy URL path that App Service uses to check if the container is capable of serving requests. A 404 response simply indicates that the path doesn't exist, but it lets App Service know that the container is healthy and ready to respond to requests.