Is there any known issue? I recently noted a few times that mails I sent to this list take rather long (some more than an hour) before they reach this list.

The problem is not with the list delivery to me, the delayed message is also missing from
http://lists.freepascal.org/pipermail/fpc-devel/2016-February/date.html

This one went through immediately.
And so did a resent of the one I sent 20 minute ago. Lets see when the original will make it (sorry there will be a duplicate)

Couple of my emails sent in past 1-2 weeks never reached the list. I thought it was just me, but now not so sure...