Can't reproduce on latest Firefox {{147.0.2}}, Chrome {{146.0.7680}} nor MS Edge {{144.0.3719.115}}, demo XWiki 17.10.3 with LibreOffice {{14425.08.37194.1152}}.
Here's result of creation page by importing file or calling import macro and passing file [^011-[FREE]-Clipart-4Pages-DOCX-1.docx] (with pre-selected {{Filter styles}} by default):
* [^Created page from imported docx in 17.10.3.png] * [^Imported content from docx into sandbox page in 17.10.3.png]
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