diff --git a/lib/ui/dialogs/initial_interval_dialog.dart b/lib/ui/dialogs/initial_interval_dialog.dart
index ff23fb9..47fe4f3 100644
--- a/lib/ui/dialogs/initial_interval_dialog.dart
+++ b/lib/ui/dialogs/initial_interval_dialog.dart
@@ -93,9 +93,11 @@ class InitialIntervalDialog extends HookWidget {
               onPressed: () {
                 if (correctController.text.isEmpty ||
                     veryCorrectController.text.isEmpty) {
-                  _snackbarService.showSnackbar(
-                    message: 'Both intervals must be provided',
-                  );
+                  if (!_snackbarService.isSnackbarOpen) {
+                    _snackbarService.showSnackbar(
+                      message: 'Both intervals must be provided',
+                    );
+                  }
                   return;
                 }
 
@@ -105,10 +107,12 @@ class InitialIntervalDialog extends HookWidget {
                 if (correctInterval == 0 ||
                     veryCorrectInterval == 0 ||
                     correctInterval > veryCorrectInterval) {
-                  _snackbarService.showSnackbar(
-                    message:
-                        'Both intervals must be greater than 0 and the very correct answer interval must be larger',
-                  );
+                  if (!_snackbarService.isSnackbarOpen) {
+                    _snackbarService.showSnackbar(
+                      message:
+                          'Both intervals must be greater than 0 and the very correct answer interval must be larger',
+                    );
+                  }
                   return;
                 }
 
diff --git a/lib/ui/dialogs/search_filter_dialog.dart b/lib/ui/dialogs/search_filter_dialog.dart
index ea4ffc4..27ebc16 100644
--- a/lib/ui/dialogs/search_filter_dialog.dart
+++ b/lib/ui/dialogs/search_filter_dialog.dart
@@ -1,18 +1,20 @@
 import 'package:flutter/material.dart';
-import 'package:sagase/app/app.locator.dart';
 import 'package:sagase/services/dictionary_service.dart' show SearchFilter;
-import 'package:sagase/services/shared_preferences_service.dart';
 import 'package:stacked_services/stacked_services.dart';
 
 class SearchFilterDialog extends StatelessWidget {
   final DialogRequest request;
   final Function(DialogResponse) completer;
 
-  const SearchFilterDialog({
+  final SearchFilter searchFilter;
+  final bool properNounsEnabled;
+
+  SearchFilterDialog({
     required this.request,
     required this.completer,
     super.key,
-  });
+  })  : searchFilter = request.data.$1,
+        properNounsEnabled = request.data.$2;
 
   @override
   Widget build(BuildContext context) {
@@ -41,7 +43,7 @@ class SearchFilterDialog extends StatelessWidget {
               toggleable: true,
               title: const Text('Vocab'),
               groupValue: SearchFilter.vocab,
-              value: request.data,
+              value: searchFilter,
               onChanged: (_) => completer(
                 DialogResponse(data: SearchFilter.vocab),
               ),
@@ -50,7 +52,7 @@ class SearchFilterDialog extends StatelessWidget {
               toggleable: true,
               title: const Text('Kanji'),
               groupValue: SearchFilter.kanji,
-              value: request.data,
+              value: searchFilter,
               onChanged: (_) => completer(
                 DialogResponse(data: SearchFilter.kanji),
               ),
@@ -58,18 +60,14 @@ class SearchFilterDialog extends StatelessWidget {
             RadioListTile<SearchFilter>(
               toggleable: true,
               title: const Text('Proper nouns'),
+              subtitle:
+                  properNounsEnabled ? null : const Text('Enable in settings'),
               groupValue: SearchFilter.properNouns,
-              value: request.data,
-              onChanged: (_) {
-                if (locator<SharedPreferencesService>()
-                    .getProperNounsEnabled()) {
-                  completer(DialogResponse(data: SearchFilter.properNouns));
-                } else {
-                  locator<SnackbarService>().showSnackbar(
-                    message: 'Enable proper noun dictionary in settings',
-                  );
-                }
-              },
+              value: searchFilter,
+              onChanged: properNounsEnabled
+                  ? (_) =>
+                      completer(DialogResponse(data: SearchFilter.properNouns))
+                  : null,
             ),
           ],
         ),
diff --git a/lib/ui/views/flashcard_set_settings/flashcard_set_settings_viewmodel.dart b/lib/ui/views/flashcard_set_settings/flashcard_set_settings_viewmodel.dart
index a797a71..69eccea 100644
--- a/lib/ui/views/flashcard_set_settings/flashcard_set_settings_viewmodel.dart
+++ b/lib/ui/views/flashcard_set_settings/flashcard_set_settings_viewmodel.dart
@@ -222,9 +222,11 @@ class FlashcardSetSettingsViewModel extends FutureViewModel {
   void openFlashcardSet() {
     if (flashcardSet.myDictionaryLists.isEmpty &&
         flashcardSet.predefinedDictionaryLists.isEmpty) {
-      _snackbarService.showSnackbar(
-        message: 'Add lists to your flashcard set to open flashcards',
-      );
+      if (!_snackbarService.isSnackbarOpen) {
+        _snackbarService.showSnackbar(
+          message: 'Add lists to your flashcard set to open flashcards',
+        );
+      }
       return;
     }
 
diff --git a/lib/ui/views/kanji/kanji_viewmodel.dart b/lib/ui/views/kanji/kanji_viewmodel.dart
index d0ab277..cbe3027 100644
--- a/lib/ui/views/kanji/kanji_viewmodel.dart
+++ b/lib/ui/views/kanji/kanji_viewmodel.dart
@@ -150,10 +150,12 @@ class KanjiViewModel extends FutureViewModel {
 
   void copyKanji() {
     Clipboard.setData(ClipboardData(text: kanji.kanji));
-    _snackbarService.showSnackbar(
-      message: '${kanji.kanji} copied to clipboard',
-      duration: const Duration(seconds: 1),
-    );
+    if (!_snackbarService.isSnackbarOpen) {
+      _snackbarService.showSnackbar(
+        message: '${kanji.kanji} copied to clipboard',
+        duration: const Duration(seconds: 1),
+      );
+    }
   }
 
   void setStrokeDiagramStartExpanded(bool value) {
diff --git a/lib/ui/views/learning/learning_viewmodel.dart b/lib/ui/views/learning/learning_viewmodel.dart
index 3a4b879..0078e12 100644
--- a/lib/ui/views/learning/learning_viewmodel.dart
+++ b/lib/ui/views/learning/learning_viewmodel.dart
@@ -44,9 +44,11 @@ class LearningViewModel extends FutureViewModel {
   void openFlashcardSet(FlashcardSet flashcardSet) {
     if (flashcardSet.myDictionaryLists.isEmpty &&
         flashcardSet.predefinedDictionaryLists.isEmpty) {
-      _snackbarService.showSnackbar(
-        message: 'Add lists to your flashcard set to open flashcards',
-      );
+      if (!_snackbarService.isSnackbarOpen) {
+        _snackbarService.showSnackbar(
+          message: 'Add lists to your flashcard set to open flashcards',
+        );
+      }
       return;
     }
 
@@ -65,9 +67,11 @@ class LearningViewModel extends FutureViewModel {
 
     if (flashcardSet.myDictionaryLists.isEmpty &&
         flashcardSet.predefinedDictionaryLists.isEmpty) {
-      _snackbarService.showSnackbar(
-        message: 'Add lists to your flashcard set to open flashcards',
-      );
+      if (!_snackbarService.isSnackbarOpen) {
+        _snackbarService.showSnackbar(
+          message: 'Add lists to your flashcard set to open flashcards',
+        );
+      }
       return;
     }
 
diff --git a/lib/ui/views/radical/radical_viewmodel.dart b/lib/ui/views/radical/radical_viewmodel.dart
index 18f93d4..956c586 100644
--- a/lib/ui/views/radical/radical_viewmodel.dart
+++ b/lib/ui/views/radical/radical_viewmodel.dart
@@ -76,10 +76,12 @@ class RadicalViewModel extends FutureViewModel {
 
   void copyToClipboard(String text) {
     Clipboard.setData(ClipboardData(text: text));
-    _snackbarService.showSnackbar(
-      message: '$text copied to clipboard',
-      duration: const Duration(seconds: 1),
-    );
+    if (!_snackbarService.isSnackbarOpen) {
+      _snackbarService.showSnackbar(
+        message: '$text copied to clipboard',
+        duration: const Duration(seconds: 1),
+      );
+    }
   }
 
   void setStrokeDiagramStartExpanded(bool value) {
diff --git a/lib/ui/views/search/search_viewmodel.dart b/lib/ui/views/search/search_viewmodel.dart
index 71bb41d..f679c7c 100644
--- a/lib/ui/views/search/search_viewmodel.dart
+++ b/lib/ui/views/search/search_viewmodel.dart
@@ -5,6 +5,7 @@ import 'package:sagase/app/app.dialogs.dart';
 import 'package:sagase/app/app.locator.dart';
 import 'package:sagase/app/app.router.dart';
 import 'package:sagase/services/mecab_service.dart';
+import 'package:sagase/services/shared_preferences_service.dart';
 import 'package:sagase_dictionary/sagase_dictionary.dart';
 import 'package:sagase/services/digital_ink_service.dart';
 import 'package:sagase/services/dictionary_service.dart';
@@ -19,6 +20,7 @@ class SearchViewModel extends FutureViewModel {
   final _snackbarService = locator<SnackbarService>();
   final _dialogService = locator<DialogService>();
   final _mecabService = locator<MecabService>();
+  final _sharedPreferencesService = locator<SharedPreferencesService>();
 
   final _kanaKit = const KanaKit();
 
@@ -122,10 +124,12 @@ class SearchViewModel extends FutureViewModel {
 
   void toggleHandWriting() {
     if (!_digitalInkService.ready) {
-      _snackbarService.showSnackbar(
-        message:
-            'Hand writing detection is setting up. Please try again later.',
-      );
+      if (!_snackbarService.isSnackbarOpen) {
+        _snackbarService.showSnackbar(
+          message:
+              'Hand writing detection is setting up. Please try again later.',
+        );
+      }
       return;
     }
     _showHandWriting = !showHandWriting;
@@ -165,7 +169,7 @@ class SearchViewModel extends FutureViewModel {
   Future<void> setSearchFilter() async {
     final response = await _dialogService.showCustomDialog(
       variant: DialogType.searchFilter,
-      data: _searchFilter,
+      data: (_searchFilter, _sharedPreferencesService.getProperNounsEnabled()),
       barrierDismissible: true,
     );
 
diff --git a/lib/ui/views/text_analysis/text_analysis_viewmodel.dart b/lib/ui/views/text_analysis/text_analysis_viewmodel.dart
index 66cfc47..bf4b47a 100644
--- a/lib/ui/views/text_analysis/text_analysis_viewmodel.dart
+++ b/lib/ui/views/text_analysis/text_analysis_viewmodel.dart
@@ -146,10 +146,12 @@ class TextAnalysisViewModel extends FutureViewModel {
     // Copy to clipboard
     Clipboard.setData(ClipboardData(text: buffer.toString()));
 
-    _snackbarService.showSnackbar(
-      message: '$buffer copied to clipboard',
-      duration: const Duration(seconds: 1),
-    );
+    if (!_snackbarService.isSnackbarOpen) {
+      _snackbarService.showSnackbar(
+        message: '$buffer copied to clipboard',
+        duration: const Duration(seconds: 1),
+      );
+    }
   }
 
   void textAnalysisHistoryItemSelected(TextAnalysisHistoryItem item) {
diff --git a/lib/ui/views/vocab/vocab_viewmodel.dart b/lib/ui/views/vocab/vocab_viewmodel.dart
index 17064c7..c58ae0d 100644
--- a/lib/ui/views/vocab/vocab_viewmodel.dart
+++ b/lib/ui/views/vocab/vocab_viewmodel.dart
@@ -188,9 +188,12 @@ class VocabViewModel extends FutureViewModel {
       }
     } else {
       Clipboard.setData(ClipboardData(text: reference.text));
-      _snackbarService.showSnackbar(
-        message: 'Reference not found. ${reference.text} copied to clipboard.',
-      );
+      if (!_snackbarService.isSnackbarOpen) {
+        _snackbarService.showSnackbar(
+          message:
+              'Reference not found. ${reference.text} copied to clipboard.',
+        );
+      }
     }
   }