Quest that becomes bugged the moment I reload?

[ppscurry]

There's a certain statue you have to interact with in the old city in order to get a cornett. I did just that and got it just fine but then because I had to reload, I needed to talk to it again. Now, the damned quest doesn't work anymore even after I restarted the game. The worst part is that it is the exact same save that used to work. Exactly what is going here?