A development team is managing a web application deployed in the us-east-1 region, utilizing three availability zones (us-east-1a, us-east-1b, and us-east-1c). The web traffic for this application is distributed using a load balancer. However, the team discovered that when one of the EC2 instances running the web application fails, the load balancer continues to direct traffic to the failed instance, resulting in intermittent issues for users.

What actions should the development team take to mitigate this problem?