Water discoloration when holding tiny dripleafs

When holding a tiny dripleaf in the main hand the water gets darker. Happens only if the water is one block deep, and the blocks under it are sand. Affects it with fancy graphics on as well with fancy graphics off, although there it is less noticeable. Discoloration can be reseted, by making annew water source there (e.g. placing dripstone in the water, or placing a block, then breaking it).