DockingDesktop.close(Dockable dockable) bug

[Arthur N]

I have a CompoundDockable ("Plots") that is auto-hidable.  Inside are several Dockables ("Plot 1", "Plot 2", ... ).
In my application, if I execute File->New, I want to close all the existing plots, and create new ones.
So, I call DockingDesktop.close(Dockable dockable) on each plot.

If "Plots" is visible (ie, pinned), everything works as expected.  But if "Plots" is not visible.  DockingDesktop.close( ) doesn't close the plot dockables.

Abbreviated debug/trace info follows:

-------------------------------------

public void close(Dockable dockable) {
  DockableState currentState = getDockableState(dockable);  /* DockableState [DockKey[Mag], state=DOCKED, position=RelativePosition .... */
 
  if (currentState == null || currentState.isClosed()){
    return;
  }
 
  DockableState.Location currentLocation = getLocation(currentState);   /* DOCKED */
 
  /* position=, newState=, dswe=, dae= all omitted for brevity */
 
  if (dockingPanel.isAncestorOf(dockable.getComponent())) {   /* Returns false */
     /* ... */
  } else if (currentState.isHidden()) {   /* Returns false */
     /* ... */
  } else if (currentState.isFloating()){    /* Returns false */
     /* ... */
  } else if (currentState.isMaximized()){   /* Returns false */
     /* ... */
  }
}

-------------------------------------

DockingDesktop.close(Dockable dockable_in_unpinned_autohide_compound_dockable) is a no-op.

dockable.getComponent() is correctly returning my plot:
       Plot[[0.0 .. 1.0][-1.05 .. 1.05]]@1544851525

but "boolean java.awt.Container.isAncestorOf(Component c)" returns false,
because the auto-hide container is removing the children from the hierarchy.

As a workaround, I follow
     desktop.close( dockable );
     desktop.unregisterDockable(dockable);
with
     desktop.remove( dockable );
             /* This method shouldn't be used by user applications (only by the framework).  */
but I'm looking for a proper solution.

Thanks.