[2300] head method does not work with mode: spa

In nuxt.config.js:

module.exports = {
	mode: 'spa',
        head: {
                title: 'Generic title',
                meta: [
                    { charset: 'utf-8' },
                    { name: 'viewport', content: 'width=device-width, initial-scale=1' },
                    { hid: 'description', name: 'description', content: 'Generic description' }
                ]
        }
    /*
    ** other things
    */
}

In one of the pages (/pages/b.vue):

<script>
export default {
        head () {
		return {
			title: 'Page B',
			meta: [
				{ hid: 'description', name: 'description', content: 'Page B description' }
			]
		}
	}
}
</script>

Then "nuxt generate"

Go to /dist/b/index.html

Expect to see:

<meta data-n-head="true" content="Page B description" name="description" data-hid="description">

and

<title data-n-head="true">Page B</title>

but get:

<meta data-n-head="true" content="Generic description" name="description" data-hid="description">

and

<title data-n-head="true">Generic title</title>

Related to: https://nuxtjs.org/api/pages-head/