Try this: 1. Open a (text, spredsheet, ...) document in LibreOffice. 2. Open the search bar via Ctrl-F. 3. Close the document. 4. Open another (or the same) document. Observe that the search bar is still open, even though, one (i.e., I) would assume that the search bar is a session-/document-specific piece of UI. In a newly-created document, the search bar looks especially out of place.
Closing this as a dupe of bug 65346. Sorry for clicking Submit twice… *** This bug has been marked as a duplicate of bug 65346 ***