The sides of water do not render through some partial blocks, such as slabs, stairs, extended pistons, daylight sensors, and possibly more.
MC-131334
Sides of water do not render through certain blocks
Resolved
Duplicate
0
Unoriginal Name
(Unassigned)
Unconfirmed
Minecraft 1.13-pre1
Retrieved
Also affects repeaters, enchantment tables, end portal frames, carpets, comparators, and snow layers. Water in waterlogged blocks also does not render its sides.