diff --git a/src/ConfigView.swift b/src/ConfigView.swift
index 7f2c1c8..f6c9b42 100644
--- a/src/ConfigView.swift
+++ b/src/ConfigView.swift
@@ -46,7 +46,8 @@ struct ConfigView: View {
               data: child,
               onUpdate: { value in
                 setConfig(uri, child["Option"] as! String, value)
-                viewModel.refresh(uri)
+                // Don't call viewModel.refresh here because view may be in a temporary invalid state,
+                // e.g. having removed key of punctuation map but not put anything yet.
               })
           }
         }
diff --git a/src/config/ListView.swift b/src/config/ListView.swift
index 19945e3..79dca2c 100644
--- a/src/config/ListView.swift
+++ b/src/config/ListView.swift
@@ -14,6 +14,7 @@ private func serialize(_ value: [Any]) -> [String: Any] {
 }
 
 private struct ListSectionHeader: View {
+  let children: Any?
   @Binding var value: Any
 
   var body: some View {
@@ -21,7 +22,14 @@ private struct ListSectionHeader: View {
       Spacer()
       Button {
         var list = deserialize(value)
-        list.append("")
+        if let children = children as? [[String: Any]] {
+          list.append(
+            children.reduce(into: [:]) { result, child in
+              result[child["Option"] as! String] = child["DefaultValue"] ?? ""
+            } as NSDictionary)
+        } else {
+          list.append("")
+        }
         value = serialize(list)
       } label: {
         Image(systemName: "plus")
@@ -40,7 +48,7 @@ struct ListSubView: OptionViewProtocol {
     let optionViewType = toOptionViewType(["Type": String(type.suffix(type.count - "List|".count))])
     var list = deserialize(value)
     List {
-      Section(header: ListSectionHeader(value: $value)) {
+      Section(header: ListSectionHeader(children: data["Children"], value: $value)) {
         ForEach(list.indices, id: \.self) { i in
           AnyView(
             optionViewType.init(
diff --git a/src/config/StringView.swift b/src/config/StringView.swift
index 2e9aac1..ac1881e 100644
--- a/src/config/StringView.swift
+++ b/src/config/StringView.swift
@@ -14,7 +14,12 @@ struct StringView: View, OptionViewProtocol {
         "",
         text: Binding<String>(
           get: { value as! String },
-          set: { value = $0 }
+          set: {
+            // Avoid unnecessary write.
+            if value as! String != $0 {
+              value = $0
+            }
+          }
         )
       )
       // Leading for List item, trailing for String option.