CodeDeploy just recognizes IAM instance profiles after restarting agent

Hello,

I was trying to do a deploy using codedeploy, and after some fails I noticed I forgot to attach the IAM instance profile to my instance. So, I attached the profile to my instance but I was still receiving the same error "Missing credentials - please check if this instance was started with an IAM instance profile", even after listing and downloading objects from my bucket using the cli. So after all, I restarted the codedeploy-agent service and it worked. What could have happened?