I am using two plugins for my site, WooCommerce and The Events Calendar. They both add custom post types of their own, which I've tried adding custom field templates to. I've put their custom post type slugs in the settings and the fields show up on the edit page correctly. If I click the 'Save' button in the Custom Field Template panel it saves the field data - but if I click 'Update', that change is overwritten. Eg, the fields don't save.
Is there some extra code I have to add to those two plugins to ensure the Custom Field Template data is saved when I click 'Update'?