Meta query sort order is lexigraphical instead of numeric

Question

I'm working with lumber and have custom post types with ACF fields for height and width in decimals.

I'm trying to sort my posts first by height and then by width. I am using the following code:

// sort stock and custom profiles by height first then width
add_action( 'pre_get_posts', function ( $query ) {
     if( is_admin() ) {
         return $query;
     }

    // Check if post_type is either 'stock' or 'custom'
    if( isset($query->query_vars['post_type']) && ($query->query_vars['post_type'] == 'stock' || $query->query_vars['post_type'] == 'custom') ) {

        $meta_query = array(
            'relation' => 'AND',
            'clause1' => array(
                'key'     => 'height_decimal',
                'compare' => 'EXISTS',
            ),
            'clause2' => array(
                'key'     => 'width_decimal',
                'compare' => 'EXISTS',
            )
        );

        $query->set('meta_query', $meta_query);

        $query->set('orderby', array( 
            'clause1' => 'ASC', 
            'clause2' => 'ASC' 
        ));       
    }

    // Return the modified query
    return $query;
} );

This is working great in post archive and taxonomy archive pages. But I have a filter on the categories and when the filter is used they stay in order BUT it switches to a lexicographic order instead of numeric.

So on the taxonomy archive page the order is:

0.1 0.200 0.3 0.4

But when the Ajax filter is applied the order switches to:

0.1 0.3 0.4 0.200

I have tried adding

'type' => 'NUMERIC',

to my two clauses but that removes the custom sorting all together.