serviceworker導入によるエラーと思われる事象について

Question

PWA化を行いたく、serviceworkerを導入したのですが、ローカルでは特に問題なく動いているのですが、herokuでのproduction環境ですとなにやらapplication.jsが以下のような理由により働いていないではないか思われます。

・ログインした時などの出ていた、toastrというgemで作成された「ログインしました」をはじめとするフラッシュメッセージが出なくなってしまった。
・ドロップダウンバーをクリックしても各々のリンクボタンが出てこない。
・micropostの削除ボタンを押すとローカルではdeleteできるが、production環境では、heroku_logsにて以下エラーとなっている。（なぜか、GETにrouteされている）

ActionController::RoutingError (No route matches [GET] "/microposts/3052"):

micropost削除ボタンのコード　
_micropost.html.erb

<% if current_user?(micropost.user) %>
  <%= link_to "削除する", micropost_path(micropost), method: :delete, data: { confirm: "削除してもいいですか？"} %>
<% end %>

原因ではないかと自分で思うコードを掲載させて頂きますので、もしお分かりになる方がいらっしゃいましたら、ご指摘頂ければ幸いです。

application.js

// This is a manifest file that'll be compiled into application.js, which will include all the files
// listed below.
//
// Any JavaScript/Coffee file within this directory, lib/assets/javascripts, vendor/assets/javascripts,
// or any plugin's vendor/assets/javascripts directory can be referenced here using a relative path.
//
// It's not advisable to add code directly here, but if you do, it'll appear at the bottom of the
// compiled file.
//
// Read Sprockets README (https://github.com/rails/sprockets#sprockets-directives) for details
// about supported directives.
//
//= require jquery
//= require jquery_ujs
//= require turbolinks
//= require_tree .
//= require jquery
//= require bootstrap-sprockets
//= require toastr
//= require serviceworker-companion

javascripts/serviceworker-companion.js

if (navigator.serviceWorker) {
  navigator.serviceWorker.register('/serviceworker.js', { scope: './' })
    .then(function(reg) {
      console.log('[Companion]', 'Service worker registered!');
    });
}

javascripts/serviceworker.js.erb

// fetchvar CACHE_VERSION = 'v1';
var CACHE_VERSION = 'v1';
var CACHE_NAME = CACHE_VERSION + ':sw-cache-';

function onInstall(event) {
  console.log('[Serviceworker]', "Installing!", event);
  event.waitUntil(
    caches.open(CACHE_NAME).then(function prefill(cache) {
      return cache.addAll([

        // make sure serviceworker.js is not required by application.js
        // if you want to reference application.js from here
        '<%#= asset_path "www_domain/application.js" %>',

        '<%= asset_path "www_domain/application.css" %>',

        '/offline.html',

      ]);
    })
  );
}

function onActivate(event) {
  console.log('[Serviceworker]', "Activating!", event);
  event.waitUntil(
    caches.keys().then(function(cacheNames) {
      return Promise.all(
        cacheNames.filter(function(cacheName) {
          // Return true if you want to remove this cache,
          // but remember that caches are shared across
          // the whole origin
          return cacheName.indexOf(CACHE_VERSION) !== 0;
        }).map(function(cacheName) {
          return caches.delete(cacheName);
        })
      );
    })
  );
}

// Borrowed from https://github.com/TalAter/UpUp
function onFetch(event) {
  event.respondWith(
    // try to return untouched request from network first
    fetch(event.request).catch(function() {
      // if it fails, try to return request from the cache
      return caches.match(event.request).then(function(response) {
        if (response) {
          return response;
        }
        // if not found in cache, return default offline content for navigate requests
        if (event.request.mode === 'navigate' ||
          (event.request.method === 'GET' && event.request.headers.get('accept').includes('text/html'))) {
          console.log('[Serviceworker]', "Fetching offline content", event);
          return caches.match('/offline.html');
        }
      })
    })
  );
}

self.addEventListener('install', onInstall);
self.addEventListener('activate', onActivate);
self.addEventListener('fetch', onFetch);

config/environments/production.rb

  config.assets.js_compressor = Uglifier.new(harmony: true)
  config.assets.css_compressor = :sass

  # Do not fallback to assets pipeline if a precompiled asset is missed.
  config.assets.compile = true

javascripts/application.js

// This is a manifest file that'll be compiled into application.js, which will include all the files
// listed below.
//
// Any JavaScript/Coffee file within this directory, lib/assets/javascripts, vendor/assets/javascripts,
// or any plugin's vendor/assets/javascripts directory can be referenced here using a relative path.
//
// It's not advisable to add code directly here, but if you do, it'll appear at the bottom of the
// compiled file.
//
// Read Sprockets README (https://github.com/rails/sprockets#sprockets-directives) for details
// about supported directives.
//
//= require jquery
//= require rails-ujs
//= require turbolinks
//= require bootstrap-sprockets
//= require toastr
//= require serviceworker-companion
//= require_tree .

長々と大変恐縮ですが、ご確認いただければと思います。