I found a bug or glitch. (It might just be a feature of the map though) So after the huge cave full of every type of mob possible after the slime cave, you get to the part where you encounter Ron zombie and Lidor zombie in soul sand. After getting to the very end of the area, I can't get trough the doorway, as if there are barrier blocks blocking it, and then I get teleport 2 blocks to the left and then killed by zombie Lidor's spinning attack. I honestly hope this is a bug because I've been stuck at this part for a whole day now.
Oh, so I figured it out. I stood in the corner and got teleported 2 blocks to the left but I was still on the right said of a soul sand block sticking out of the ground. I then walked forward and went through the corridor. (It still might be a bug btw, but Idk anything about mapmaking)
I'm so bad, I didn't realize Ron kicks you so you get teleported 2 blocks to the left. xD