...

src/main/java/com/fasterxml/jackson/core/JsonPointer.java

@@ -103,7 +103,7 @@ public class JsonPointer implements Serializable
      * We will retain representation of the pointer, as a String,
      * so that {@link #toString} should be as efficient as possible.
      *<p>
-     * NOTE: starting with 2.14, there is no accompanying
+     * NOTE: starting with 2.14, there is now accompanying
      * {@link #_asStringOffset} that MUST be considered with this String;
      * this {@code String} may contain preceding path, as it is now full path
      * of parent pointer, except for the outermost pointer instance.
@@ -836,6 +836,7 @@ protected JsonPointer _constructHead()
         ArrayList<JsonPointer> pointers = new ArrayList<>();
 
         JsonPointer current = this;
+
         while (current != last) {
             String str = current.toString();
             JsonPointer nextSegment = new JsonPointer(str.substring(0, str.length() - suffixLength), 0,

src/test/java/com/fasterxml/jackson/failing/JsonPointer1328Test.java

@@ -23,8 +23,13 @@ void deepHead()
 
     private final static String repeat(String part, int count) {
         StringBuilder sb = new StringBuilder(count * part.length());
+        int index = 0;
         while (--count >= 0) {
-            sb.append(part);
+            // Add variation so we'll have "a0" .. "a8"; this to try
+            // to avoid possibility of accidentally "working" with
+            // super-repetitive paths
+            sb.append(part).append(index % 9);
+            ++index;
         }
         return sb.toString();
     }