Madrigal Debut not unlocking

Hello! I had to post this cuz I’m losing my head over this. On CEA, on Assault on the Control Room, the Siegue of Madrigal theme is hidden almost at the finish of the mission. I have tried different difficulties, killing everyone, skipping the lastest fights, not killing anyone, playing co-op and standing where the music starts for 15 minutes, but achievement doesn’t pop or appears as unlocked. The music starts but achievement eludes me. I think this is an old issue. Is 343 ever gonna fix it? Is there a current fix?

If you search this:

you’ll find an existing thread on this issue. I’d suggest going to the Halo Support site and submitting a ticket there