The trophy "seascape" doesn't pop at the end of the fight on the Lady Vengeance. I have the most recent update from 8 march, I didn't know what was in at first, I saw earlier it was supposed to fix the bug I've just had. My psn profile shows that I had the trophy for arriving at reaper's cost without either "seascape" or "swashbuckler", althought I had met the conditions for the first one.
I've started a fresh new run on lowest difficulty (I was in honour mode before), thinking that maybe things were messed up because the save file was created before the patch (I've already had a problem of this kind in DOS), but it didn't change anything. I've tried to not kill anyone, kill some ennemies but not all of them, force Dallis to retreat ... it never popped. The other trophy, swashbuckler, dropped normally when I tried it though.
Any idea how to solve this problem ?