Windows 1909 cumulative update fixes some of the bugs that made File Explorer search unusable since the November 2019 Update was released. The most important fix is that File Explorer no longer briefly freezes and the search field does not become unresponsive. This update also lets you right-click and paste text like you were able to do in previous versions of Windows 10. Some issues remain, but there is still room for improvement with the search function still not being able to delete unwanted search results that are repetitive or unwanted.
Source: https://www.bleepingcomputer.com/news/microsoft/windows-10-1909-kb4532695-update-fixes-file-explorer-bugs/