In the search view when items are checked there are no additional actions related to these selected elements. Correct me if I'm wrong but I don't see any additional actions, or functionality behind these checkboxes:
There's also a bug if you use the header checkbox to toggle all elements' checkboxes on the list. It looks like the checkbox view simply doesn't correlate with the internal state where all elements are actually checked, but maybe it's the opposite - the header checkbox view only changes its view.