Water just above sea grass or kelp (it doesn't have to be surrounded by anything) appears invisible when there is no other water in the chunk.
Water Texture disappears when slabs are placed underneath
Sea Grass makes water disappear??
Water is invisble when slabs are in certain positions
Tridents being too loyal and invisible water
Water Is Not Rendered (at all)
Kelp planted in personal farm makes top water texture disappear
Water Disappears In new 18w08b Snapchot
Graphical glitch: some water faces not rendered on and near hacked water