I can't finish the quest "Ay Vaz's Masterpiece"
 

I've defeated 2 ships so I have 2/3. After destroying the 3rd ship, it's still stuck at 2/3...

Keep trying.
I'm stuck in 0/0.No matter what i do it's stuck at 0.
Perhaps my timing when accepting the quest was bad.
I'll try to clear the other missions on the island then retry again (shame i don't have one save before the quest was active)

Same problem as you here.... let me know if you find a way.....:confused:

Known issue. From the bug thread:

Quests and Bosses

1. Ay Vaz's Masterpiece: Several players have reported the counter does not go up for defeating all three pirate ships, make this quest unable to be completed. A save game where it can be reproduced is here.

Please let us know if you find a workaround.

As it is a quest, i would imagine even if the latest patch has a fix (not mentioned in changelog) it would still need a game restart..... I have the KBScanner and believe that you can edit save files with that so does anyone out there know how we could do this please? Thanks!