Nginx regex based location directive does not capture whole requested path

Question

I have this location directive:

    location ~* ^/(_nuxt|_libs|_img|_fonts)/(.*) {
        alias /srv/nuxt/tools/dist/$1;
        try_files /$2 =404;
    }

This matches and serves successfully: /_img/logo.png

but not: /_libs/AryaBootstrap/css/bootstrap.min.css (returns 404).

Any idea what is going wrong here?