Duplicate Pages (Old Revisions) being shown in tables

When a page is created with a "label" and subsequently that page is edited, the label becomes duplicated and as such the page is then shown twice.

Screenshot "Table_List_showing_duplicate_pages.png" shows duplicate pages in table list:

Screenshot "Older_Version_Of_Page.png" shows duplicate page as an old version.

When this page is edited it reverts to the current version. Page is then saved and duplicate is removed temporarily.

When the page is subsequently refreshed the duplicate page returns.

I have not yet been able to create The duplication steps that always result in a duplicate page.

Possibilities are using the "Page Properties" Macro for tagging/labeling pages. Remove this does remove the duplicate, but once added again duplicate returns.