registrations_checkout_field_update_order_meta doesn't include attributes

[ajlowndes]

Everywhere the title and variation of the registration is displayed it is in the format
product-name - registration-dates-formatted-for-readability

but if an attribute is also in the metadata as well as the dates attribute, then the attribute is not shown. it should be
product-name - attribute-name - registration-dates-formatted-for-readability

Can't figure out how WC does it in the "line items" section of the admin edit-order page - see screenshot

Cheers,