In Bug 34227 - Add persistent selections and batch operations to item search, selections from item searches are retained across item searches until they are manually cleared. This has proven to be confusing for our branch staff, and ideally this would be something that could be opted in or out of. A potential use case is that a branch staff member may run an item search of all items in a shelf location, select several, and export a list of those items for someone to pull from the shelf. The branch staff member then does another item search with different criteria, then batch edits them to mark them missing. It is easy for them not to notice the additional selections or to forget to clear them, resulting in items edited by mistake.