When deploying ECS, Subnets and VPC will not populate in the UI

Issue

An organization using ECS as a deployment target may run into an issue where, when creating a deployment, the Subnets and Load Balancers defined will not populate in the drop-down menus of Spinnaker. 

Cause

There is a known issue with ECS populating Subnet and Load Balancer information upon the creation of a deployment. This issue is due to a bug. Armory is looking into this issue and will update this article and release notes when a fix is completed.