In Beta 1.17.0.52, Lava and Water is having issues loading their textures properly past y = 0.

Lava and water textures are appearing bugged once you proceed past y = 0. Only the top texture of the lava and water source blocks are rendered while the flowing textures fail to load except the top texture. Dropping water/lava from a height higher than 0 looks fine until it passes 0 where it becomes its glitched form.