Triton provider doesn't appear to run tasks in parallel

I have a small bit of terraform:

resource "triton_machine" "vault" {
  count = 3
  name = "vault-${format("%02d", count.index+1)}"
  package = "sample-256M"
  image =
  networks = []

  affinity = ["role!=~vault"]

  tags = {
    role = "vault"
    env = "infra"

Looking at the logs in Triton these three machines are getting created in a serial fashion.

Is there something I can do (or is this a bug with the provider) to make creations happen in parallel?