Multiple taxonomy fields in one metabox not saving (only the last one)

Hello,

I have a metabox where I want the user to pick 3 different categories for the post. I'm only using the category taxonomy, and sub-categories as sort of 'custom taxonomies'. The peculiair thing is, only the last taxonomy field is saving. How I can I make them save all of them?

     array (
                'id' => $prefix . 'type_',
                'type' => 'taxonomy',
                'name' => esc_html__( 'Type', 'text-domain' ),
                'query_args' => array(
                    'include' => '3,4,5,6,7',
                ),
                'taxonomy' => 'category',
                'field_type' => 'select',
                'columns' => 3,
            ),  
            array (
                'id' => $prefix . 'materiaal',
                'type' => 'taxonomy',
                'name' => esc_html__( 'Material', 'text-domain' ),
                'query_args' => array(
                    'include' => '13,14,15,16',
                ),
                'taxonomy' => 'category',
                'field_type' => 'select',
                'columns' => 3,
            ),          array (
                'id' => $prefix . 'aandrijving',
                'type' => 'taxonomy',
                'name' => esc_html__( 'Engine', 'text-domain' ),
                'query_args' => array(
                    'include' => '9,10,11',
                ),
                'taxonomy' => 'category',
                'field_type' => 'select',
                'columns' => 3,
            ),