I recently noticed that when breaking blocks, when the cracks appear, on the sides if you are not facing a side of the block but if it is in your FOV, it will light up despite the darkness.
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Please force a crash by pressing F3 + C for 10 seconds while in-game and attach the crash report ([minecraft/crash-reports/crash-<DATE>-client.txt|http://hopper.minecraft.net/help/finding-minecraft-data-folder]
) here.