src/java.desktop/share/classes/com/sun/imageio/plugins/png/PNGImageReader.java

@@ -1696,7 +1696,8 @@
     private void resetStreamSettings() {
         gotHeader = false;
         gotMetadata = false;
         metadata = null;
         pixelStream = null;
+        imageStartPosition = -1L;
     }
 }