The "held by system" stub can appear for a few reasons:
•The post was pulled from public view by a forum moderator for review. Possible reasons for this include, but are not limited to, violation of site rules and/or terms of service.
•The member is on a post-watch requiring moderator approval before the post becomes public.
•Flood control/autohold has kicked in:
The autohold for lots of posts from one location within a certain time frame is separate from post watch. It will happen when you are not on watch as well. It's a form of flood control. You made 15 posts in 15 minutes. That's happened numerous times on the site, and a great many times the person doing it was spamming, so the autohold was put there to deal with it. It's aimed only at #posts/timeframe.
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