bug: table cell background color mangled on import/export

[umaplehurst]

What happened?

On import: the gray table cells are shown as white instead of as gray
On export: the gray table cells are black instead of gray when opened up in LibreOffice

Steps to reproduce

Test .docx attached.

docx-editor-numbering.docx

SuperDoc version

1.31.0

Browser

None

Additional context

No response

[linear]

IT-1007