ActiveJob queue adapter ignored?

Question

user_controller.rb

class UsersController
  def create
    MyJob.perform_later
    User.create(...)
  end
end

my_job.rb

class MyJob < ActiveJob::Base
  queue_as :default

  def perform()
    puts "START"
    sleep 3
    puts "END"
  end
end

config/initializer/sucker_punch.rb

require 'sucker_punch/async_syntax'
Rails.application.configure do
  config.active_job.queue_adapter = :sucker_punch
end

When I run MyJob.perform_laterin a rails console, everything work fine and the logger display this message Enqueued MyJob (Job ID: 6c857af8-a8ed-4bd0-918b-4296c4315727) to SuckerPunch(default)

However, when I send an http request to my user_controller, I don't receive any response before 3 seconds (which make me think that the job is not executed asynchronously), and the logger display this Enqueued MyJob (Job ID: e3d698eb-00d8-4849-9496-f01c53fc7217) to Inline(default)

It seems to use the inline (default?) adapter in controllers, which is not asynchronous.

ps : I'm using puma as http server, and using sucker_punch without ActiveJob works fine