It's just that there's no super easy way of joining a mailing list to report a bug and make sure that people know about it... without having all of the list traffic also come along for the ride.
There *is* a way, you can subscribe-nomail so your mail will go directly to the list. We usually CC the original sender so you would receive the answer in any case. If you don't subscribe, your mail to the mailing list will be stuck in a moderated queue, and suffer some delay until it's verified to be non-spam.
Regards, Andreas
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