Once I reached this area, the quest Siren Song reached a progress.
Forgive me for not taking a screenshot of the moment it appears, but this is a situation I’ve experienced many times and I think it’s a bug.
Thanks for reporting, we will check this bounty. Did you have all sirens counted for the progress or just some (bounty progressed just partially)?
Only one siren was counted for the quest progress, originally the number of sirens in this area was the same as the number needed for the quest, but I could eliminate one less now.
Got it, thanks for the info, will try to reproduce