The Bug
A soul sand under the water is glowing in the daytime if there is no block above it.(Please look at the photo below.)
Steps to Reproduce
Put a soul sand under the water, if the bubble can flow up to the surface, it is glowing.
MC-207257 Glowing gets applied to the upper texture of water of waterlogged sculk sensors
MC-258257 Bubble columns retain their light levels from the sky after upgrading old worlds