Hello,
I am NOT denying that a given person is behind this, I am just sharing random thoughts :
only articles that are the SAME topic of discussion
May be this same topic is misleading the AI. After all, if one article on a given topic, is raising filter, an other article on the same or related topics should too.
The topic itself might be totally clean, but, for the AI, may be it's related to something else, that "we", humans, can't think about. Or may be this topic is also used in a different way by some.
Since 2-3 months, I also see policy violation notices, coming randomly, about a single page of one of my site. I still didn't figured out what can trigger it, but each time this notice is removed from the policy center, one or two days later, without any action from me. (no change in the page, and no apply for a review). So may be this is hiccups of the system. Or may be notifications are sent automatically, then manually reviewed. I have no idea.
Now I have a theory, BUT, without any proof, so this is really just a loose guess, but, for some reasons, I feel like it might be related to how a visitor is reaching a page, and not the page content itself. Like for example, a page with "violence" related content, links to an article at another site, someone follows the link, this other page is associated to the concept of "violence" by Google/Adsense. I know it sounds silly, and I hope this is not the case, otherwise, imagine how it can be abused.