blocks with direct sky access are lit normally. light sources such as lanterns, torches and any block with a light level more than 0 does not seem to spread to other blocks like normal. i dont know if this is only visual or actually affects light levers bc my base is on a mushroom island. it seems to be inconsistent to each chunk. some chunks are affected and others arent. reloading the chunks fixes the problem, same with reloading the world.