Fix Suggestion Provider for Crossref during autocompletion disable

src/main/java/org/jabref/gui/LibraryTab.java

@@ -563,7 +563,8 @@ private void setupAutoCompletion() {
             suggestionProviders = new SuggestionProviders(getDatabase(), Globals.journalAbbreviationRepository, autoCompletePreferences);
         } else {
             // Create empty suggestion providers if auto-completion is deactivated
-            suggestionProviders = new SuggestionProviders();
+//            suggestionProviders = new SuggestionProviders();
+            suggestionProviders = new SuggestionProviders(getDatabase());
         }
         searchAutoCompleter = new PersonNameSuggestionProvider(FieldFactory.getPersonNameFields(), getDatabase());
     }

src/main/java/org/jabref/gui/autocompleter/SuggestionProviders.java

@@ -22,14 +22,26 @@ public SuggestionProviders(BibDatabase database, JournalAbbreviationRepository a
         this.isEmpty = false;
     }
 
+    public SuggestionProviders(BibDatabase database) {
+        this.database = database;
+        this.isEmpty = true;
+    }
+
     public SuggestionProviders() {
         this.isEmpty = true;
     }
 
     public SuggestionProvider<?> getForField(Field field) {
         if (isEmpty || !autoCompletePreferences.getCompleteFields().contains(field)) {
+            Set<FieldProperty> fieldProperties = field.getProperties();
+            if (fieldProperties.contains(FieldProperty.SINGLE_ENTRY_LINK)) {
+                return new BibEntrySuggestionProvider(database);
+            }
             return new EmptySuggestionProvider();
         }
+//        if (isEmpty || !autoCompletePreferences.getCompleteFields().contains(field)) {
+//            return new EmptySuggestionProvider();
+//        }
 
         Set<FieldProperty> fieldProperties = field.getProperties();
         if (fieldProperties.contains(FieldProperty.PERSON_NAMES)) {