Light isn't working correctly. Near the coordinates shown on the images, light doesn't update and isn't working.

For example, mobs don't burn even though there aren't any blocks above them. The shadow probably would look like a fake dark zone, but it actually behaves as a place with low light levels, even with mobs like zombies, endermans, skeletons or creepers spawning there.

I've tried to update the zone with TNT explosions, but even with them the affected space doesn't update correctly. If I place blocks near  a extremely notorious zone, it seems top get illuminated, but it doesn't behave as a normal zone and even undead mobs that aren't on the dark zone don't get burn.

Seed: 5616051625065212617