src/share/classes/java/time/temporal/ChronoField.java

@@ -546,11 +546,11 @@
             return getName();
         }
 
         LocaleResources lr = LocaleProviderAdapter.getResourceBundleBased()
                                     .getLocaleResources(locale);
-        ResourceBundle rb = lr.getFormatData();
+        ResourceBundle rb = lr.getJavaTimeFormatData();
         String key = "field." + displayNameKey;
         return rb.containsKey(key) ? rb.getString(key) : getName();
     }
 
     @Override