Steps to replicate:

1. Create a page with the label 'foo'
2. Insert a page properties macro with the label 'FOO'
3. Create another page and insert a page properties report macro with the label 'FOO'

Result:

Nothing will show

Expected Result:

As all labels are converted to lower case on page anyway it should accept any case.

Workaround:

In the page properties report macro, refer to the label in lower case.