RLCraft Dregora - The End generated with no Ender Dragon

I ran into a problem with The End. I found the End Portal and entered The End, but ....
as soon as I got there, I noticed there was already a tunnel leading up to where you fight the Ender Dragon. The blocks looked patched together, and there were even Ender Pearls lying around from mobs.

The weirdest part is that I couldn't find the Ender Dragon anywhere. After looking around, I noticed there were already two End Gateways, as if someone had already defeated the dragon.

I've played quite a few RLCraft worlds before, and this End looked strangely familiar. Could my world be corrupted or bugged? Is there any way to fix it? It doesn't affect gameplay too much, but I really want to fight the Ender Dragon for the full experience.