iOS 18 Reminders search fails to find many completed items.

When Searching for some items in the iOS 18 Reminders app, often completed items are not found using the Search function. Going to the list where the item should be, showing completed items, and manually scrolling through down through the completed reminders will locate it. By “uncompleting" the target item, search will find it. This bug has happened before in other major updates and is eventually fixed; meanwhile, however, it’s a big time-wasting nuisance!