For documents saved in MS Word DOC/DOCX format the page numbering resets to 1 (or sometimes 8) whenever the starting page number is set above 255 when set via the following:

Format>Paragraph...>Text Flow>
 ..
 Breaks
  [x] Insert [Type: Page  Position: Before]
  [x] With Page Style [Type: Default Page Number: 255]

The bug may also be present in other non-ODF formatted documents (not tested).  ODF formatted documents don't appear to be affected.

How to repeat:
1) create a new multi-page DOC or DOCX document using default settings.
2) modify style of first paragraph on first page as described above, setting
   the starting page number to 255.
3) enable "Footer On" in first page style 
4) insert "Page Number" field in footer of first page
5) observe that all document pages display Page Number field in
   footer area and are numbered sequentially starting at 255.
6) save and close document
7) reopen document; page numbering should still start at 255
8) modify style of first paragraph on first page again, setting the
   starting page number to 256. Save and close document.
9) reopen document; page numbering has reset, starting at 1 or sometimes 8.