Hello,
I have noticed recently that there appears to be a strange lighting bug, the cracks that form when breaking blocks do not appear on any blocks that are directly next to the player. If you're looking at the attached picture, the stone blocks around the player and the dirt block under the player will not show cracks. The glitch appears to only affect the blocks directly in front, behind, left, and right of the player up to 3 blocks from the players feet. I did a fresh install of Minecraft and Forge and when checking it only appears when using Forge even if there are no mods installed. I am currently using Forge version 1.15.1 - 30.0.30