Decimal tabs misaligned in docx files

In LibreOffice when I create new tabs in the ruler with the data aligned based on the decimal point, this works with odt files and doc files, but if the document is saved as a docx file, is closed, and is then re-opened, all of the columns now appear misaligned.

Bug report submitted:
https://bugs.documentfoundation.org/show_bug.cgi?id=120972

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