syntactic sugar fails with arrow function

[FranckFreiburger]

I have a component factory that use JSX.

export default userOptions => {
	...
	return {
		functional: true,
		render: function(h, { data, props }) {
			return <span class={...

is transformed into:

	export default { functional: true, render: (h, userOptions) ...

Without using the arrow function, everything works well.

versions:
node 11.11.0
babel 7.4.0
webpack 4.29.6
vue.js 2.6.10
babel-plugin-transform-vue-jsx version: 4.0.1

[FranckFreiburger]

any status about this issue ?

[FranckFreiburger]

ping