About OrgchartEditor used in javaFX

Hello ,
In somethings I need put html in javaFx, When I drag with the mouse the chart will lost ,The chart appears again when I release (This is an example of an official website.),how to solve it ,thanks.

I have never seen or heard of such behavior. But I have never used JavaFX, either.

If you can reproduce the problem in a simple HTML page, we can help. But we have no experience with JavaFX, so we cannot help if the problem is specific to the JavaFX environment.