diff --git a/app/controllers/api/settings_controller.rb b/app/controllers/api/settings_controller.rb
index 3661513..0002c09 100644
--- a/app/controllers/api/settings_controller.rb
+++ b/app/controllers/api/settings_controller.rb
@@ -12,16 +12,22 @@ class Api::SettingsController < ApplicationController
   end
 
   def update
+    label_name = params[:label]
     coming = Fluent::Config::V1Parser.parse(params[:content], @fluentd.config_file)
-    current = @target_element
-    index = @config.elements.index current
-    unless index
+    coming_element = coming.elements.first
+
+    unless @target_element
       render_404
       return
     end
-    @config.elements[index] = coming.elements.first
+
+    @target_element.elements = coming_element.elements
+    @target_element.merge(coming_element)
+
     @config.write_to_file
-    redirect_to api_setting_path(id: element_id(coming.elements.first))
+    redirect_to api_setting_path(id: element_id(label_name, @target_element),
+                                 label: label_name,
+                                 pluginType: params[:pluginType])
   end
 
   def destroy
diff --git a/app/javascript/packs/settings.js b/app/javascript/packs/settings.js
index 6ba131a..f6150b0 100644
--- a/app/javascript/packs/settings.js
+++ b/app/javascript/packs/settings.js
@@ -7,7 +7,7 @@ $(document).ready(() => {
   const SettingSection = {
     template: "#vue-setting-section",
     props: [
-      "label",
+      "initialLabel",
       "initialId",
       "initialContent",
       "initialType",
@@ -18,6 +18,7 @@ $(document).ready(() => {
       return {
         mode: "default",
         processing: false,
+        current_label: null,
         id: null,
         content: null,
         type: null,
@@ -27,6 +28,7 @@ $(document).ready(() => {
     },
     created: function() {
       this.initialState();
+      this.current_label = this.initialLabel;
       this.id = this.initialId;
       this.content = this.initialContent;
       this.type = this.initialType;
@@ -62,6 +64,8 @@ $(document).ready(() => {
           method: "POST",
           data: {
             _method: "PATCH",
+            label: this.current_label,
+            pluginType: this.name,
             id: this.id,
             content: this.content
           },
@@ -87,7 +91,7 @@ $(document).ready(() => {
           method: "POST",
           data: {
             _method: "DELETE",
-            label: this.label,
+            label: this.current_label,
             pluginType: this.name,
             arg: this.arg,
             id: this.id,
diff --git a/app/views/api/settings/show.json.jbuilder b/app/views/api/settings/show.json.jbuilder
index a4e3486..5fe9438 100644
--- a/app/views/api/settings/show.json.jbuilder
+++ b/app/views/api/settings/show.json.jbuilder
@@ -1 +1 @@
-json.partial! "api/settings/element", element: @section
+json.partial! "api/settings/element", current_label: params[:label], element: @target_element
diff --git a/app/views/fluentd/settings/source_and_output.html.haml b/app/views/fluentd/settings/source_and_output.html.haml
index 44fce6c..aab5e70 100644
--- a/app/views/fluentd/settings/source_and_output.html.haml
+++ b/app/views/fluentd/settings/source_and_output.html.haml
@@ -61,7 +61,7 @@
       %setting-section{"v-if" => "loaded && elements.sources && elements.sources.length > 0",
                        "v-for" => "source in elements.sources",
                        "v-bind:key" => "source.id",
-                       "v-bind:label" => "source.current_label",
+                       "v-bind:initial-label" => "source.current_label",
                        "v-bind:initial-id" => "source.id",
                        "v-bind:initial-content" => "source.content",
                        "v-bind:initial-type" => "source.type",
@@ -74,7 +74,7 @@
       %setting-section{"v-if" => "loaded && elements.filters.length > 0",
                        "v-for" => "filter in elements.filters",
                        "v-bind:key" => "filter.id",
-                       "v-bind:label" => "filter.current_label",
+                       "v-bind:initial-label" => "filter.current_label",
                        "v-bind:initial-id" => "filter.id",
                        "v-bind:initial-content" => "filter.content",
                        "v-bind:initial-type" => "filter.type",
@@ -88,7 +88,7 @@
       %setting-section{"v-if" => "loaded && elements.matches.length > 0",
                        "v-for" => "match in elements.matches",
                        "v-bind:key" => "match.id",
-                       "v-bind:label" => "match.current_label",
+                       "v-bind:initial-label" => "match.current_label",
                        "v-bind:initial-id" => "match.id",
                        "v-bind:initial-content" => "match.content",
                        "v-bind:initial-type" => "match.type",
diff --git a/app/views/shared/vue/_setting.html.erb b/app/views/shared/vue/_setting.html.erb
index 71b25c9..0ce8e9b 100644
--- a/app/views/shared/vue/_setting.html.erb
+++ b/app/views/shared/vue/_setting.html.erb
@@ -11,7 +11,7 @@
   <div class="card-body collapse" v-bind:id="id">
     <pre v-if="mode != 'edit'">{{ content }}</pre>
     <p v-if="mode == 'edit'">
-      <textarea v-config-editor class="form-control" v-model="content" v-bind:disabled="processing"></textarea>
+      <textarea v-config-editor class="form-control" v-model.lazy="content" v-bind:disabled="processing"></textarea>
     </p>
     <p class="float-right">
       <button v-if="mode != 'edit'" class="btn btn-secondary" v-on:click="onEdit"><%= t('terms.edit') %></button>