when in act IV (final act), the dragon disappears from the square where it challenges rincewind and reappears at the end

[i30817]

I think this is a bug because the dragon reappears in the barn where it was for act III, and is never shown to fly away.

It looks like a bug because you actually can't do anything with the dragon in the barn then, and the final swamp dragon m16 after 'loading' triggers the final puzzle only in the square, even if you had it all filled up with the lit dynamite, and the two lit coals, which makes me think the dragon wasn't supposed to disappear from the square, but the barn, and be left in the square. You can't even interact with chuckles who is in the stocks behind the dragon when he's missing (although you can go there, which maybe shouldn't be allowed).