diff --git a/src/lib/output/themes/default/DefaultTheme.tsx b/src/lib/output/themes/default/DefaultTheme.tsx
index d675659cd..a3ab05b79 100644
--- a/src/lib/output/themes/default/DefaultTheme.tsx
+++ b/src/lib/output/themes/default/DefaultTheme.tsx
@@ -383,21 +383,11 @@ export class DefaultTheme extends Theme {
             }
 
             if (parent.categories && shouldShowCategories(parent, opts)) {
-                const noneCategory = parent.categories.find((x) => x.title === "none");
-                const otherCategories = parent.categories.filter((x) => x.title !== "none");
-
-                const mappedOthers = filterMap(otherCategories, toNavigation);
-
-                if (noneCategory) {
-                    const noneMappedChildren = filterMap(noneCategory.children, toNavigation);
-                    return [...noneMappedChildren, ...mappedOthers];
-                }
-
-                return mappedOthers;
+                return filterMapWithNoneCollection(parent.categories);
             }
 
             if (parent.groups && shouldShowGroups(parent, opts)) {
-                return filterMap(parent.groups, toNavigation);
+                return filterMapWithNoneCollection(parent.groups);
             }
 
             if (opts.includeFolders && parent.childrenIncludingDocuments?.some((child) => child.name.includes("/"))) {
@@ -407,6 +397,20 @@ export class DefaultTheme extends Theme {
             return filterMap(parent.childrenIncludingDocuments, toNavigation);
         }
 
+        function filterMapWithNoneCollection(reflection: ReflectionGroup[] | ReflectionCategory[]) {
+            const none = reflection.find((x) => x.title.toLocaleLowerCase() === "none");
+            const others = reflection.filter((x) => x.title.toLocaleLowerCase() !== "none");
+
+            const mappedOthers = filterMap(others, toNavigation);
+
+            if (none) {
+                const noneMappedChildren = filterMap(none.children, toNavigation);
+                return [...noneMappedChildren, ...mappedOthers];
+            }
+
+            return mappedOthers;
+        }
+
         function deriveModuleFolders(children: Array<DeclarationReflection | DocumentReflection>) {
             const result: NavigationElement[] = [];