If you use Terraform, you should only update your infrastructure through Terraform and persist the state in a shared place (e.g. S3 versioning). I see people having hard time when they use both AWS CLI, AWS console and Terraform.
This is my big pain point with Terraform. Sometimes I forgot to update only through Terraform. Especially when it's trivial to do the change through UI but not necessarily the config.
I wish Terraform could automatically detect the change and convert it into code.