Most likely innocent explanation would be that they have so many exceptions to so many complicated rules that they just didn't notice and developers who have mo

Most likely innocent explanation would be that they have so many exceptions to so many complicated rules that they just didn't notice and developers who have more access than they should aren't too eager to voluntarily report it. But, given track record of FBs dishonesty, everything is possible including they did it on purpose and now just lie and play it down as some kind of failure of the process.