When using the "Suggestion: Address the xx ticket(s) on priority" list, the result is sometimes showing closed tickets in the listed suggestions.
Release : 17.3 and above
Perform Initial Load and Refresh index and data on the search server which should resolve the issue.
Please refer to the below documentation for more information on how this can be done.
https://techdocs.broadcom.com/us/en/ca-enterprise-software/business-management/ca-service-management/17-3/administering/configure-the-xflow-interface/perform-initial-load-and-refresh-index-and-data-on-the-search-server.html