On certain platforms/browsers, instead of a country flag being displayed next to Pay Run title, text shows for the respective payroll country e.g "AU", "NZ", "UK", etc.
If you are affected, the only solution is to install a browser plugin:
Chrome: https://chrome.google.com/webstore/detail/country-flag-fixer/jhcpefjbhmbkgjgipkhndplfbhdecijh