Hi @maven
I understand you are having troubles with utilizing DLC for your builds when using our aws-ecr Orb.
I believe you are likely seeing the same issue reported on our Orb here.
In short, the latest aws-ecr Orb uses Docker Buildx, and is not leveraging the cached layers from DLC on CircleCI.
I have shared possible next steps here.
If you are looking for how to use caches when building with Docker Buildx, you may also like to refer to this Discuss post answer 
Hope this helps!