http://prntscr.com/3wcpq6

As the picture shows, the end generation in the Debug world seems to be every other chunk.

Used night vision to help see a little bit, sorry not that clear.

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Also, http://prntscr.com/3wcqi4
They are hovering (no obsidian towers etc)

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Also when you break the beacon thingy, you are left with a floating fire. Facing on the north side of where it was.

So yh. The end is broken in Debug world.