How to enable sorting in custom media uploader in plugin

In my plugin I need a media uploader exactly like the one you see when you select a post's featured image.

I managed to do almost everything with this code:

media_uploader = window.wp.media({
    frame: 'select',
    title: 'Carica le foto',
    multiple: true,
    library: {
        type: 'image',
        search: null,
        uploadedTo: postID
    },
    button: {
        text: 'Imposta come principale'
    }
});

The problem is that I can't sort the uploaded images. If I click and drag the images in the media uploader, the images are stuck.

I can see that in my uploader there is the class ui-sortable-disabled wich is absent in the default one (see images below). I searched in the documentation but I didn't find anything useful about this topic.