Custom field data isn't been indexed when posted from front-end.

Hi there, thanks for the plugin. I have a small form on the front end that simply adds a custom field using add_post_meta. Since it’s submitted from the front-end, I need to run the indexing again from the plugin’s settings in order for it to pick up the custom field data. Is there some way I can hook into your plugin while I’m doing my add_post_meta so that relevanssi indexes it straight away?

I saw this function but unsure if it’s relevant to me:
relevanssi_index_doc($id, $remove_first, $custom_fields, $bypasspost);

I should note that I’m not creating a post from the front-end, just adding some custom data for the currently displayed post.

Thank you!

https://www.ads-software.com/extend/plugins/relevanssi/