We observe this issue with SceneBuilder, if we drop an XY chart and set its padding, then resize it, its legend does not resize correctly.

Attached is a small standalone program that shows the problem.

Unzip, build, and run.
Click on "Drop" => a chart is added to the scenegraph
Click on "Padding" => the chart padding is changed to (0, 5, 5, 5)
Click on "Resize" => the chart pref size is divided by 2 and its location is changed - but the legend bar at the bottom keeps its old size.