I just finished talking to the call center, not much they can provide, nor can they explain why some applications take shorter/longer than the projected 12 months period. But at least they can tell you, things are in order and nothing is outstanding. My wife's application is from Dec and in process since March. Hang in there.Totally normal and I am in the same boat! According to the spreadsheet that tracks everyone who gives their stats on this forum, there are 48% of December 2018 applicants who are in the same situation as us
You can check it out at https://docs.google.com/spreadsheets/d/1UVvKb4Sem00uOCyB2kTeM2_AofgT_8b4uTJyBh9pXdg/edit#gid=566701841