But the “wprm_ingredients” field is not defined with the posts, at least I cannot see any contents associated with that field with the post objects. It is used with the recipes post type for sure, I am seeing associated content there.
Can you give me a few example phrases I should try, which yielded results in the Lite version, but does not return any results in the Pro? I would like to compare them by searching via both plugins, to see where is the difference in the query, in theory it should be identical.