If you have magma blocks and you break the blocks below them, when the particles clip through the magma blocks (possibly another bug?), they appear to be light level 15 even though they should not be. It is easier to see with lighter colored blocks like sandstone.
- Go in a dark area
- Place a block down
- Place a magma block above that block
- Break the block below the magma block
You will see block particles that are too bright as they clip the magma block