Galleon's Graveyard Bug?

In the room after the first cannon battle, after receiving this dialogue:
[1/3] ???: Landlubber! Yer not think you can battle me!
[2/3] ???: Man the cannons! We'll be having a good battle once again!
[3/3] ???: What are you all waiting for you damned souls!
I'm surrounded by barrier blocks and can't move in any direction, making it impossible for me to continue with the dungeon.
This is the second time this has happened, is this a known bug/glitch?

 

I believe the Galleon's Graveyard dungeon is very broken overall, and the cutscene has been known to freeze up. Some people have said doing /class and going back in can solve the problem, so try that. If it still doesn't work, switch servers and try again. If that still doesn't work, you might have to do /kill to get out of the barriers.

Hopefully by the next update/push this dungeon and its cutscenes will be fully fixed. But for now, the only thing you can do is try to find a way past it.