Lightning/rain does not occur in Mesa, Desert, or Savanna biomes

Lightning does not occur in Mesa, Desert, or Savanna biomes during Thunderstorms. I believe this to be a bug since it means that it is impossible to get charged creepers and thus some mob heads in worlds that are all Mesa, Desert, or Savanna.

I understand that rain is not intended for these biomes since they are "hot" biomes, but lightning should still occur in these places as it does in real life and in other Minecraft biomes.