One of the changes made in this cycle was something to eat automated posts. It is supposed to cancel any posts that take under 15 seconds to make. However, it seems to also be eating posts that take more than a couple minutes to create. So for any long posts, I recommend copying the text prior to hitting submit, or writing it outside of the board (in Notepad or the like) until I resolve this.
Since automated posts were never a problem, I may just exise this modification from the board.