Description:
For some documents I don't like to fix the page count as it is physical but as displayed numbers of the last page number. For that I use a cross-referenced page number field. In LO 7.6.1.2 this works faulty.
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Version: 7.6.1.2 (X86_64) / LibreOffice Community
Build ID: 60(Build:2)
CPU threads: 4; OS: Linux 5.15; UI render: default; VCL: gtk3
Locale: de-DE (de_DE.UTF-8); UI: en-US
Ubuntu package version: 4:7.6.1~rc2-0ubuntu0.22.04.1~lo2
Calc: threaded


Steps to Reproduce:
My document has physical 5 pages, 2 pages intro and 3 pages content. Now I want to insert in the footer: page 3 of 3 pages.
For that reason I insert a (non printable) frame at the bottom of page 3, insert therein a page number field.
This page number field I define as a cross-reference (set reference: LastPage). When I set the reference an additional field shows up right beside the page number field (which is a bug). 
Then I insert the cross-reference in the footer.
Problem: The remaining superfluous field in the frame will hold the number and not change; after deleting it the entire cross-reference is broken (also in the footer).

Actual Results:
see above

Expected Results:
see above


Reproducible: Always


User Profile Reset: No

Additional Info:
On LO 7.4.7.2 and on OpenOffice 4.1.14 there are no problems for cross-referencing page number fields.