To reproduce, run the attached test program on a Windows platform using a recent JDK + JavaFX. For example, it reproduces using JDK 19 + JavaFX 19 and also reproduces using the latest JDK 20 ea and JavaFX 20 ea.

1. Run the program: "java SimpleSwingNodeTest"

2. BUG: The Swing content in the SwingNode will not initially be displayed. See "SwingNode-Windows-initial.png".

3. Mouse over the black rectangle where the label and button should be

4. BUG: The JButton is now displayed, but the JLabel is not. See SwingNode-Windows-2.png

5. Maximize and then restore the window using the window decoration controls

6. It will now be drawn correctly. See SwingNode-Windows-final.png.

NOTE: This was originally filed as JDK-8193103, which was closed as a duplicate of JDK-8170386, and that bug was later closed as Incomplete.

Note also that on a Hi-DPI Windows system the text in the SwingNode is blurry, so I'll file a separate bug (against javafx.swing rather than client-libs).