Everything went well during the interview. Few questions about where/how we met, when we plan to travel and the lady also looked through more pictures of us. Went into AP as somehow I forgot to take my birth certificate but she advised the interview was all fine and she wished us luck for the future.
2 hours after the interview I received instructions how to submit my birth certificate via DX Couriers. I had to take it to a specific location and they packaged everything. That was delivered 4 days after the interview (including the weekend). My CEAC status remained refused on that day. Day after delivery (5 days after interview) CEAC status changed to issued!