Miva - Fix for Missing Basket/Order Custom Fields in Order Confirmation Emails
<mvt:item name="customfields" param="Read_Order( l.settings:order:id, 'order_instructions', l.settings:order:customfields:instructions )" />
<mvt:if expr="NOT(l.settings:order:customfields:instructions)">
<mvt:item name="customfields" param="Read_Basket( 'order_instructions', l.settings:order:customfields:instructions )" />
</mvt:if>
<mvt:if expr="l.settings:order:customfields:instructions">
Order Instructions:
&mvte:order:customfields:instructions;
</mvt:if>