Is there any chance that this is StackPath related, @(you need an account to see links)? If you're encountering those all-white validation pages as you're browsing around Neopets, then those pages can also interrupt your score submission when playing games. A trick to work around that would be to keep a separate tab open in your browser that you can refresh to trigger validation again before you submit your score. If you can clear the validation page away before submitting, then your scores should go through as expected.