Issue with 'Search for product keys'Solved

I am trying to use the ‘Search for product keys’ option to list all license that have not yet been activated. 

'Number of activations' looks to be the correct option, but setting ‘Less that 1 Used/Total Activations’ randomly works, but more often shows ‘No product keys found’.

When it does work, it shows multiple pages (when 20 results per page is set), but fails when any page other than the first is selected.

(Really need a 'Website Issues' forum option…)