src/java.desktop/unix/classes/sun/awt/X11/XDecoratedPeer.java

@@ -325,10 +325,12 @@
                 if (!isEmbedded() && !isTargetUndecorated()) {
                     lastKnownInsets.put(getClass(), in);
                 }
                 if (!in.equals(dimensions.getInsets())) {
                     handleCorrectInsets(in);
+                } else {
+                    content.setContentBounds(dimensions);
                 }
                 insets_corrected = true;
             }
         }
     }