Related to

Issue JDK-8151974 - Invisible controls are still accessible by screen readers.

Content of all tabs of a TabPane is accessible to screen readers, so will be listed, even for the tabs that are not selected.

Only the selected tab content should be accessible. If you observe Windows native tabbed dialogs (e.g. Windows Explorer file properties), only the selected tab will appear in the accessibility tree.

As a work around for now we add and remove the content from tabs as they are selected / deselected.