diff --git a/lib/form_filler.mjs b/lib/form_filler.mjs
index 05ee69c..0fbfd09 100644
--- a/lib/form_filler.mjs
+++ b/lib/form_filler.mjs
@@ -56,11 +56,18 @@ function extractLabel(node) {
   raw = raw.replace(/\s+/g, ' ').replace(/\s*\*\s*$/, '').replace(/\s*Required\s*$/i, '').trim();
   // Deduplicate repeated label text (LinkedIn renders label text twice)
   if (raw.length > 8) {
-    for (let len = Math.ceil(raw.length / 2); len >= 4; len--) {
-      const candidate = raw.slice(0, len);
-      if (raw.startsWith(candidate + candidate)) {
-        raw = candidate.trim();
-        break;
+    const half = Math.ceil(raw.length / 2);
+    const firstHalf = raw.slice(0, half).trim();
+    const secondHalf = raw.slice(half).trim();
+    if (firstHalf === secondHalf) {
+      raw = firstHalf;
+    } else {
+      // Also check with space separator: "ABC ABC" -> "ABC"
+      const spaceIdx = raw.indexOf(' ', Math.floor(raw.length / 2) - 2);
+      if (spaceIdx > 0) {
+        const left = raw.slice(0, spaceIdx).trim();
+        const right = raw.slice(spaceIdx).trim();
+        if (left === right) raw = left;
       }
     }
   }
@@ -95,9 +102,18 @@ function checkRequired(node) {
 function normalizeLegend(el) {
   let raw = (el.textContent || '').replace(/\s+/g, ' ').replace(/\s*\*\s*$/, '').replace(/\s*Required\s*$/i, '').trim();
   if (raw.length > 8) {
-    for (let len = Math.ceil(raw.length / 2); len >= 4; len--) {
-      const candidate = raw.slice(0, len);
-      if (raw.startsWith(candidate + candidate)) { raw = candidate.trim(); break; }
+    const half = Math.ceil(raw.length / 2);
+    const firstHalf = raw.slice(0, half).trim();
+    const secondHalf = raw.slice(half).trim();
+    if (firstHalf === secondHalf) {
+      raw = firstHalf;
+    } else {
+      const spaceIdx = raw.indexOf(' ', Math.floor(raw.length / 2) - 2);
+      if (spaceIdx > 0) {
+        const left = raw.slice(0, spaceIdx).trim();
+        const right = raw.slice(spaceIdx).trim();
+        if (left === right) raw = left;
+      }
     }
   }
   return raw;
@@ -354,11 +370,17 @@ Answer:`;
         let raw = forLabel || ariaLabel || linked || ancestorLabel || node.placeholder || node.name || '';
         raw = raw.replace(/\s+/g, ' ').replace(/\s*\*\s*$/, '').replace(/\s*Required\s*$/i, '').trim();
         if (raw.length > 8) {
-          for (let len = Math.ceil(raw.length / 2); len >= 4; len--) {
-            const candidate = raw.slice(0, len);
-            if (raw.startsWith(candidate + candidate)) {
-              raw = candidate.trim();
-              break;
+          const half = Math.ceil(raw.length / 2);
+          const firstHalf = raw.slice(0, half).trim();
+          const secondHalf = raw.slice(half).trim();
+          if (firstHalf === secondHalf) {
+            raw = firstHalf;
+          } else {
+            const spaceIdx = raw.indexOf(' ', Math.floor(raw.length / 2) - 2);
+            if (spaceIdx > 0) {
+              const left = raw.slice(0, spaceIdx).trim();
+              const right = raw.slice(spaceIdx).trim();
+              if (left === right) raw = left;
             }
           }
         }
@@ -387,9 +409,18 @@ Answer:`;
       function _normalizeLegend(el) {
         let raw = (el.textContent || '').replace(/\s+/g, ' ').replace(/\s*\*\s*$/, '').replace(/\s*Required\s*$/i, '').trim();
         if (raw.length > 8) {
-          for (let len = Math.ceil(raw.length / 2); len >= 4; len--) {
-            const candidate = raw.slice(0, len);
-            if (raw.startsWith(candidate + candidate)) { raw = candidate.trim(); break; }
+          const half = Math.ceil(raw.length / 2);
+          const firstHalf = raw.slice(0, half).trim();
+          const secondHalf = raw.slice(half).trim();
+          if (firstHalf === secondHalf) {
+            raw = firstHalf;
+          } else {
+            const spaceIdx = raw.indexOf(' ', Math.floor(raw.length / 2) - 2);
+            if (spaceIdx > 0) {
+              const left = raw.slice(0, spaceIdx).trim();
+              const right = raw.slice(spaceIdx).trim();
+              if (left === right) raw = left;
+            }
           }
         }
         return raw;