🚀 go-pugleaf

As far as I know, there is no way to find and replace xref formats in Frame. 

What I would do is, I would save the file to MIF and open the MIF in a text editor (if I'm in Windows, I just use Word to edit MIF). You can do a search and replace in the text editor for the string: 

<XRefName `Heading & Page'> 

And replace with: 

<XRefName `Issue Number'> 

I would recommend against using "Replace All," as the MIF contains xref definitions as well as instances of them in the doc; you don't want to change the name of the definition, just the instances that are in the doc. I would also test this carefully before doing it to all your docs--create a test version, save to MIF, open in a text editor, change a couple of xrefs using search and replace, then open the MIF in Frame and make sure the changed xrefs work properly. If it works, you should be able to change all your xrefs much faster this way than from within Frame. 

However, none of this explains why your page number continues to occur in PDF after you removed it from the xref format. That is a mystery to me.