I have a SharePoint 2016 on-premises farm that had recently crashed. I had to rebuild the farm, but was able to recover the WSS_Content database and get all the sites back up and running. However, I have some search features on one site that are not working properly and I can't seem to figure out why. We have a document library that contains a large number of PDF files and several columns of text metadata that describe the PDF for searching.
When I first brought the site up, KQL searches were not working. I found out (thanks to the great users on this site) that my managed properties were not mapped to my crawled properties. I fixed this and searches started working. However, the site also had refiners set up using four of the fields and they are still not working properly. I found yesterday that the Refinable property on the managed property was set to No, so I went back and set it to "yes - active". I did a full re-index of the site and one of the properties began showing up in the refiners section of the search. However, the other three properties are still not showing up. When I edited the web part to check that the properties were added, it was showing them as added to the list, but that no data was available. Can anyone help lead me in the right direction to get this working?