Just to add to this,
a) posts going into pre-moderation will be because they use a word that's in the filter. The filter is quite extensive at the moment but is changed nearly daily to refine it better.
b) there was a recent change to make sure there was a filter that affected all posts on the site, not just OPs. Before that, anything could be posted in lots of threads without any automatic flagging. Which was not good.
c) I have asked before but will make the case again for editing posts to not automatically trigger the filter in particular circumstances.
d) Every year I make the case for the premoderation filter to be changeable depending on forum. There are some words which you would be happy to discuss in TV Shows that you would want to check in News & Current Affairs etc. I have made that case again in recent months and would encourage TSR to seriously consider this as the most ideal solution for user experience and for ease of effective moderation