Superflat genaration bug

Seed:818489454178297260

Flat World: minecraft:bedrock,20*minecraft:stone,5*minecraft:dirt,5*minecraft:sand,90*minecraft:water;24;oceanmonument,cave,biome_1,mineshaft,decoration,ravine

Water doesn't generate properly (blocks of air underwater) - Location : X-84 Y-33 Z-105
In mineshaft torches are flying in air - Location: X- 75 Y- 25 Z- -1