Why operation cost increaseв to 0.4 CPU?

[Ranger]

I use this code:
var cu = Game.getUsedCpu();
creep.harvest(source);
console.log('operation cost:', Math.floor((Game.getUsedCpu() - cu) * 100) / 100);

And now result is "operation cost: 0.43"

[Ranger]

Ok, fixed, now cost return to 0.2 CPU