Forge team looked into the lighting issue and discovered the cause. You had an object (somehow) placed about 6,000 feet outside of the map. The lightmap needs to encircle the entirety of the objects placed on a map. So, it was made absurdly large by having to include that object a mile outside of the map.
well i don't know how that happened... Its god to know though. I know for certain I didn't place it there, lol.
I figured out how it got there. There is a glitch where if your working with blocks at the height limit, you will on occasion be teleported WAYYYY out of the map and die, but it will bring the block with you and place it where you died. I can pretty consistently replicate the glitch now.
I looked at your map and I'm not sure what's causing the lighting issue. I will ask the right people and get back to you.
