modules/javafx.graphics/src/main/java/com/sun/javafx/tk/quantum/WindowStage.java

*** 362,379 ****
--- 362,381 ----
              px = xSet ? Math.round(screen.getPlatformX() + (x - sx) * sScaleX) : 0;
              py = ySet ? Math.round(screen.getPlatformY() + (y - sy) * sScaleY) : 0;
          } else {
              px = py = 0;
          }
+         if (xSet || ySet || w > 0 || h > 0 || cw > 0 || ch > 0) {
              int pw = (int) (w > 0 ? Math.ceil(w * pScaleX) : w);
              int ph = (int) (h > 0 ? Math.ceil(h * pScaleY) : h);
              int pcw = (int) (cw > 0 ? Math.ceil(cw * pScaleX) : cw);
              int pch = (int) (ch > 0 ? Math.ceil(ch * pScaleY) : ch);
              platformWindow.setBounds(px, py, xSet, ySet,
                                       pw, ph, pcw, pch,
                                       xGravity, yGravity);
          }
+     }
  
      @Override
      public float getPlatformScaleX() {
          return platformWindow.getPlatformScaleX();
      }