This is the common concern of all the active members engaged in answering ask expert questions. Even I am too facing the same issue in the same section in one of the group website (ISC). Since editors are not reviewing the answers regularly or due to unavailability of editors, answers are kept pending for review. Most of them are busy with their personal work like exam, summer vacation leave etc. etc. Hope It will be restored soon. Till then you can keep contributing in other sections also.
With Best Regards,