Hi @Sergiu ,
Thank you for posting in this community.
To troubleshoot the issue, you can start by checking the crawl logs to see if there are any errors related to the custom columns.
To view the crawl log
- Verify that the user account that is performing this procedure is an administrator of the Search service application, or has Read permissions to it.
- In Central Administration, under Application Management, click Manage service applications.
- On the Service Applications page, click the Search service application.
- On the Search Administration page, in the Quick Launch, in the Diagnostics section, click Crawl Log.
- On the Crawl Log - Content Source page, click the view that you want.
You can also check the search service application logs for any errors or warnings. Additionally, you can try resetting the search index and performing a full crawl again to see if that resolves the issue.
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