Just need to check if array

ee/app/assets/javascripts/roadmap/mixins/filtered_search_mixin.js

@@ -219,20 +219,13 @@ export default {
         });
       }
 
-      if (labelName?.length) {
-        if (Array.isArray(labelName)) {
-          filteredSearchValue.push(
-            ...labelName.map((label) => ({
-              type: 'label_name',
-              value: { data: label, operator: OPERATOR_IS },
-            })),
-          );
-        }
-      } else {
-        filteredSearchValue.push({
-          type: 'label_name',
-          value: { data: labelName, operator: OPERATOR_IS },
-        });
+      if (labelName?.length && Array.isArray(labelName)) {
+        filteredSearchValue.push(
+          ...labelName.map((label) => ({
+            type: 'label_name',
+            value: { data: label, operator: OPERATOR_IS },
+          })),
+        );
       }
       if (notLabelName?.length) {
         filteredSearchValue.push(