Can confirm. Made 6 test payments from different IPs, using different download urls, and 2 different payment methods.
Only 1 was tracked. This is unusual; it has not happened before. The last 3 payments I did with my headers/inspect element open, and their system correctly set the 'download_url' and 'buyed_from_dl' cookie, but the sale was still not credited to the affiliate account.
This is not normal, and has never happened before. I regularly test PPS sales; only started encountering this from yesterday.