Bug with Stored Power

[Maleficent]

Hi I believe Stored Power is not work as the way it's supposed to.

 

Testing it I used my lvl 42 Clefairy to use Stored Power on lvl 40 Whismur with no stat change, which mean the power of Stored Power is 20, and it took away 1/3 Whismur's hp.

 

Next my Clefairy used 6 times of Cosmic Power (+6def, +6sp.def) then used Stored Power again on Whismur (the damage of Stored Power now is supposed to be 260), but it took away 1/3 of Whismur's hp, just like when there's no stat boost.

 

So I believe the calculation of Stored Power is not working, and the power of this move is a constant. And in my feeling it's not 20 but maybe 80, as it's too strong to be 20.