Did you restart Mailman after applying the patch? If you didn't, only periodic digests would be fixed because they are produced by a new cron process each time, but the archives and any digests triggered on size would continue to use the unpatched scrubber until the qrunners are restarted.
Did you restart Mailman after applying the patch? If you didn't, only periodic digests would be fixed because they are produced by a new cron process each time, but the archives and any digests triggered on size would continue to use the unpatched scrubber until the qrunners are restarted.