Amazon import-image task stuck on "updating" when platform is not specified

Overview of the Issue

The post-processor amazon-import (import-image-task) gets stuck in "updating" because the platform is not provided.

The AWS EC2 equivalent of this process provides an optional --platform flag which is not available in the packer-plugin-amazon plugin.

Reproduction Steps

   post-processor "amazon-import" {
      access_key          = var.aws_access_key
      secret_key          = var.aws_access_secret_id
      token               = var.aws_session_token
      region              = var.region
      s3_bucket_name      = var.s3_bucket_name
      format              = "vmdk"
      keep_input_artifact = true
      ami_name            = "packer-demo-${formatdate("YYYY-MM-DD'T'hh-mm-ssZ", timestamp())}"
      role_name           = var.role_name
      ami_encrypt         = var.ami_encrypt
      ami_kms_key         = var.ami_kms_key
      ami_users           = var.ami_users
      ami_ou_arns         = var.ami_ou_arns
      boot_mode           = var.boot_mode
      license_type        = var.license_type
    }

Result

        {
            "Architecture": "x86_64",
            "Encrypted": true,
            "ImportTaskId": "import-ami-03cf3969904860ae8",
            "KmsKeyId": "XXXXXXXXXXXXXXXXXXXXX",
            "LicenseType": "BYOL",
            "Progress": "27",
            "SnapshotDetails": [
                {
                    "DeviceName": "/dev/sde",
                    "DiskImageSize": 9525806592.0,
                    "Format": "VMDK",
                    "Status": "completed",
                    "UserBucket": {
                        "S3Bucket": "XXXXXXXXXXXXXXXXXXXXX",
                        "S3Key": "packer-import-1699295410.vmdk"
                    }
                }
            ],
            "Status": "active",
            "StatusMessage": "updating",
            "Tags": [],
            "BootMode": "uefi"
        },

Which eventually gets deleted.

Plugin and Packer version

Packer v1.9.4

 amazon = {
   version = ">=1.2.7"
   source = "github.com/hashicorp/amazon"
}

Operating system and Environment details

NAME="Ubuntu"
VERSION="20.04.6 LTS (Focal Fossa)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 20.04.6 LTS"
VERSION_ID="20.04"

Log Fragments and crash.log files

    vsphere-iso.windows (amazon-import): Completed upload of /home/user/cicd-base-windows10-template/artifacts//windows-10-2H1-pro-main-2023-11-10T01-49-06Z.vmdk to s3://XXXXXXXXXXXXX/packer-import-1699580946.vmdk
    vsphere-iso.windows (amazon-import): Setting license type to 'BYOL'
    vsphere-iso.windows (amazon-import): Started import of s3://XXXXXXXXXXXX/packer-import-1699580946.vmdk, task id import-ami-0b0d543bf1549c983
    vsphere-iso.windows (amazon-import): Waiting for task import-ami-0b0d543bf1549c983 to complete (may take a while)

        {
            "Architecture": "x86_64",
            "Encrypted": true,
            "ImportTaskId": " import-ami-0b0d543bf1549c983",
            "KmsKeyId": "XXXXXXXXXXXXXXXXXXX",
            "LicenseType": "BYOL",
            "Progress": "27",
            "SnapshotDetails": [
                {
                    "DeviceName": "/dev/sde",
                    "DiskImageSize": 9525806592.0,
                    "Format": "VMDK",
                    "Status": "completed",
                    "UserBucket": {
                        "S3Bucket": "XXXXXXXXXXXXXXXXXX",
                        "S3Key": "packer-import-1699580946.vmdk"
                    }
                }
            ],
            "Status": "active",
            "StatusMessage": "updating",
            "Tags": [],
            "BootMode": "uefi"
        }

Alternatively I have tested the AWS CLI Command that does the same thing

    post-processor "shell-local" {
      inline = [ <<EOF
        aws ec2 import-image --role-name "${var.role_name}" \
          --description ${local.vm_name_description} \
          --license-type BYOL \
          --disk-containers Format=vmdk,UserBucket="{S3Bucket=${var.s3_bucket_name},S3Key=${local.vm_name_description}.vmdk}"
        EOF
      ]
    }

and got the same results. But setting platform in the CLI command works.

    post-processor "shell-local" {
      inline = [ <<EOF
        aws ec2 import-image --role-name "${var.role_name}" \
          --description ${local.vm_name_description} \
          --platform windows \
          --license-type BYOL \
          --disk-containers Format=vmdk,UserBucket="{S3Bucket=${var.s3_bucket_name},S3Key=${local.vm_name_description}.vmdk}"
        EOF
      ]
    }

hashicorp / packer-plugin-amazon