I've been playing Ballad of a Bloodline DX in 2.53 (Build 31, same as last report) and ran into a very strange behavior. This occurs in the final dungeon, a screen to the right of the entrance:
The bug starts on this screen, when I scroll the screen to the right from this left going conveyor belt. The next screen over is a new DMap with a palette change and intro string. The intro string plays but towards the end the converyor belt starts moving Link to the left again before I regain control. If I'm holding right, Link will touch the edge of the screen but it doesn't scroll and everything reverts back to the palette of the previous DMap.
Going off the name and music I'd assume it has reverted back to the previous DMap. Going off the map position, something has gone very wrong. Scrolling to the left takes me to the screen I came from, but scrolling to the right takes me to the current screen in the correct map position but still on the wrong dmap. I wish there was a warp to the north so I could see what effect that would produce.
Returning to the screen again with the intro string done everything works as intended.
Here's a video of the whole thing in motion: