Been true for a couple of months now. I'm using some PreHeaderDB filters, but they are on specific spammers and haven't changed in a couple of years.
I tried the procedure on this page
http://help.newsbin.com/index.php/V673-FilterDownloads
regarding processor backlogs. The cache was sitting at 126 in parentheses. Afterward, it was 200/200 (1) and that one would not clear even after sitting for three hours. And still no headers in any group I tried.
It has me baffled. Windows 10 on Ryzen 7 1700, NewsBin version 6.73: 00 D5 30 ED 20 41
Ideas appreciated!