Component does not always re-render when changing theme

# Reporting a Bug?

I have an application where I would like to dynamically change the theme of my react-sortable-tree control between the default theme and the FileExplorerTheme.

I can't find any document way to explicitly set the default theme, so I am currently using:

const DEFAULT_THEME = {
rowHeight: 50,
scaffoldBlockPxWidth: 32,
nodeContentRenderer: undefined,
placeholderRenderer: undefined,
treeNodeRenderer: undefined
};

When I set the theme property for FileExplorerTheme the tree re-renders in the new theme. However when I set it back to DEFAULT_THEME the new row height and scaffold block width properties seem to take effect but other visual aspects (which I assume are under control of the renderer callbacks) do no not reset.

Does anyone know how to make this work?

Thanks
Jon.