Finch was unable to provide a connection within the timeout due to excess queuing for connections

[a3kov]

I get this error often. It's on my dev machine, there's no load at all. I only send (very few) periodic requests to 1 domain (an API).
Version: 0.21.0
My Finch config:

pools: %{
    :default => [
      size: 50,
      count: 1,
      conn_max_idle_time: 1000 * 60,
      pool_max_idle_time: 1000 * 300
    ],
    "https://api.example.com" => [
      size: 100,
      count: 1,
      conn_max_idle_time: 1000 * 60,
      start_pool_metrics?: true
    ]
  }