best_in_place nested attribute inline edit throws "204 No Content" error

I'm using the Best In Place Gem to do inline edits on a table of Tasks that has a nested attribute for Storeorder, however when I try to edit a Storeorder attribute using the instructions provided in this post, I get a 204 No Content error thrown at me. I wonder if it has to do with the first transaction beginning before the 'Storeorder Load' happens? In all non-nested BIP updates, it does the UPDATE within the first "begin transaction" call, whereas here it's still loading the Storeorder. The parameters are 100% correct as far as I can tell. See code,

Started PUT "/tasks/3" for 104.200.151.54 at 2017-02-05 18:08:24 +0000
Processing by TasksController#update as JSON
  Parameters: {"task"=>{"storeorder_attributes"=>{"id"=>"3", "activity"=>"Shipped"}}, "authenticity_token"=>"D2c3ddoIC220rkPE5i7U+EGiwSrdCq7s8vdFY8VEQTaTMqetuBo8SJX9+Wabl+Bh6A6d49Pt/Omp4E/nq/udQA==", "id"=>"3"}
  User Load (0.3ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = ? ORDER BY "users"."id" ASC LIMIT ?  [["id", 1], ["LIMIT", 1]]
  Task Load (0.2ms)  SELECT  "tasks".* FROM "tasks" WHERE "tasks"."id" = ? LIMIT ?  [["id", 3], ["LIMIT", 1]]
  CACHE (0.0ms)  SELECT  "tasks".* FROM "tasks" WHERE "tasks"."id" = ? LIMIT ?  [["id", 3], ["LIMIT", 1]]
   (0.1ms)  begin transaction
  Storeorder Load (0.2ms)  SELECT  "storeorders".* FROM "storeorders" WHERE "storeorders"."task_id" = ? LIMIT ?  [["task_id", 3], ["LIMIT", 1]]
   (0.1ms)  commit transaction
   (0.1ms)  begin transaction
   (0.1ms)  commit transaction
Completed 204 No Content in 10ms (ActiveRecord: 1.0ms)

tasks_controller.rb -->

class TasksController < ApplicationController
  before_action :set_task, only: [:show, :edit, :update, :destroy]

  def update
    @task = Task.find(params[:id])
    respond_to do |format|
      if @task.update(task_params)
        format.html { redirect_to @task, notice: 'Task was successfully updated.' }
        format.json { respond_with_bip(@task) }
      else
        format.html { render :edit }
        format.json { respond_with_bip(@task) }
      end
    end
  end

  private
    def set_task
      @task = Task.find(params[:id])
    end

    def task_params
      params.require(:task).permit!
    end
end

task.rb -->

class Task < ApplicationRecord
  has_one :storeorder, :dependent => :destroy
  accepts_nested_attributes_for :storeorder, :reject_if => lambda { |a| a[:store_id].blank? }, :allow_destroy => true
end

storeorder.rb -->

class Storeorder < ApplicationRecord
    belongs_to :task
end

dashboard.html.erb -->

<td><%= best_in_place task.storeorder, :activity, 
        url: task_path(task.id), 
        param: "task[storeorder_attributes][id]=#{task.storeorder.id}&task[storeorder_attributes]", 
        as: :select, 
        collection: [["Pending Shipment", "Pending Shipment"], ["Shipped", "Shipped"], ["Cancelled", "Cancelled"], ["Pending Further Action", "Pending Further Action"]], %>
</td>

inner HTML code -->

<span 
  data-bip-type="select" 
  data-bip-attribute="activity" 
  data-bip-collection="[["Pending Shipment","Pending Shipment"],["Shipped","Shipped"],["Cancelled","Cancelled"],["Pending Further Action","Pending Further Action"]]" 
  data-bip-inner-class="form-control" 
  data-bip-object="task[storeorder_attributes][id]=3&task[storeorder_attributes]" 
  data-bip-original-content="Pending Shipment" 
  data-bip-skip-blur="false" 
  data-bip-url="/tasks/3" 
  data-bip-value="Shipped" 
  class="best_in_place form-control" 
  id="best_in_place_storeorder_3_activity">
  Shipped
</span>

I can't see what I could possibly be missing that causes this error. It's imperative that I'm allowed to do inline edits to keep the workflow consistent, otherwise I'm open to alternative suggestions since I know BIP doesn't have nested attribute editing within their scope by default.

:reject_if => lambda { |a| a[:store_id].blank? } Don't see any store_id being passed in params.