This is the case, which I tried to investigate, but couldn't find out the reason.

Run the app with Run.java class.

Select "scaleX" from choice box. press "Apply". Will be created an HTMLEditor. which will be put in the left pane. Press verify, and HTMLEditor will be put in the right pane.

Left pane's HTMLEditor's scaleX property is set via binding on the slider's value property.
Right pane's HTMLEditor's scaleX property is set via setter of the value of the slider, when you press button "Verify".

Move slider to position 1. The left HTMLEditor will have scaleX == 1. But I don't see it, and this is the trouble. Press verify, and you will see the second (right) HTMLEditor.

The trouble - is invisibility of the left HTMLEditor

Affected tests:
SceneGraphAutomated/test/scenegraph/binding/controls/HtmlEditorTest/scaleX
SceneGraphAutomated/test/scenegraph/binding/controls/HtmlEditorTest/scaleY