Has this issue been resolved as experiencing similar issue - see below:
When applying page numbers to scratch APUB doc the application works as expected - namely create a text frame and then insert page number which results in Hash symbol contained with the text frame. Page numbers being correctly displayed on ALL pages.
My problem being that I cannot replicate this in a 50+ page document - having created the text frame on a master the ‘Insert Page Number Hash symbol’ places itself immediately outside the frame, further the number of characters displayed on document pages is limited to a single character thus page 10 showing figure 1 etc.
Note: The document has several master pages and the one to which page numbering is applied is simply a rectangular shape with infill colour used as the background for ALL pages.