I have followed the instructions found here to attempt to crawl a Document Library's columns, so that the documents can be searched by additional properties of the List Item.
After setting up the managed properties, I did a full crawl, but my list columns are still not searchable (tested via searching for "term" and "mapped_property:term").
The "Allow items form this list to appear in search results?" setting is correctly set to "Yes" (as in this MS Office page). And the list is most definitely crawled as I can search by text in the documents, but not the list column data (this also rules out the crawl account not having access).
The user I am searching as is the farm administrator account, so there is no security trimming going on here.
I've also tried following the videos posted here.
What am I missing here?