[ECS] [Service Discovery]: Service discovery is failing when you run the service on blue green deployment on ECS

I have deployed my services on ECS with blue-green deployment & Service Discovery. This blue/green deployment was achieved using Code Deploy. when I do a new deployment the old task will run for 1 hour during that time new task only will get the traffic but not the old one. the problem here it is whenever I resolve the service discovery(dns) I still get the old task which won't get the traffic. Can you please resolve this issue to get the tasks which are getting traffic. I hope I conveyed what I think. Please resolve this issue asap and also correct if am wrong.

The issue names ECS blue-green deployments, CodeDeploy, and service-discovery DNS but provides no repository files, tests, or entry point. Start by clarifying the intended DNS and task-selection behavior and whether this belongs in the ECS roadmap. Done would require an agreed service change or documented resolution.

Written by the indexing model from the issue text.