The interactions between a biome and another biome and its variants are inconsistent

Using /setblock to place an "Always Active" command block with a command won't execute the command immediately

Throwing a trident enchanted with riptide at an enderman doesn't cause it to teleport and deals damage

Crash upon loading superflat preset: Non [a-z0-9_.-] character in namespace of location: 56*minecraft:stone

Snow golems aren't damaged by splash or lingering water bottles

Endermen, blazes, snow golems and striders aren't damaged by several throwable potions which are similar to water bottles

End crystals placed on exit portals generated before 1.9 do not respawn the ender dragon

Endermen become hostile toward a player when looked at during the day