Word's w:tblpPr takes a table out of the flow; the editor kept it in, so whatever followed — and every frame anchored to it — sat as far down as the table is tall. It now arrives as the box whose content a table may be, which is the shape LibreOffice keeps such a table in, and both exporters write it back as the file's own floating one. A drawing in one of its cells is ordinary table text, so the box-in-box guard lets it stand. Claude-Session: https://claude.ai/code/session_01Wzs2qG6Y5qm7mKmJHfu44G