Going to try to keep this spoiler free, but when you get to the point where you're promted to "return to Puck" late in the current Nightingale City story, it didn't fire for me while traversing the city or when I returned to my Respite. I portaled back to the city and was facing out towards the arch of the observatory/library when it went off, immediately into a dialogue with no visible Puck, and the obvious cut to cinematic was a black screen with voice over and captions.
The quest completed at the conclusion of the dialogue and appeared to work in every other regard but, sadly, I missed everyone's favorite fae from trigger to ending of the interaction.
There was supposed to be a cut scene?!
Didnt get one. Puck did talk. When given the choices to reply to his "time to pay up", I chose option 3 (the Fae dialog option i presume) Ada chirped in mentioning she recognized the voice.
Screen went to black. Captions of dialog still running as Puck talked. But no cut scene cinematic.