Today I discovered this big shadow while exploring the overworld. (see screenshot)
The issue is basically the opposite of MC-18526.
Things to mention:
This happened in a buffet (plains) world
There aren't any blocks blocking sky light
Mobs can spawn in the shadow and undead mobs won't catch fire
The issue affects 4 whole chunks
It affects both client light and server light
The shadow disappears when you reload the world
Thank you for your report!
However, this issue is a Duplicate of MC-139038.
If you have additional information, please add it to that report.
Please search before reporting, as it's likely that one exists already.
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