When a profile is viewed by a seat, it will be hidden by the enabled
Hide Previously Viewed facet in a search after 8-9 hours. However, if the profile is viewed again within that time frame, the cool-off period is reset, and the profile will now hide after 8-9 hours from the latest viewed event.
Hide previously viewed will only hide candidates if the views are from the the seat holder executing the search. It is expected that if the view is from another seat holder, the candidate will still reflect in the search. See
Recruiter and Recruiter Lite search filters and definitions for more details.