FPS drop on cordova games

Hi, I have noticed that in every Android game I try to make (I tried to build on Intel XDK and PhoneGap) my games run well for about 1 minute (57-60fps), after that the fps drops to about 43-45...

If I close and re open the game (but when is still in background) for about 7 seconds the game runs at 60fps and after that it drops again to 43-45 fps...

I think that it's not a problem of Intel XDK or PhoneGap because I tested on both and it's not a problem of my principal game because I tried to make super little games and the results are the same, so I think that is some setting in the Project of C2 but I don't know which.

Can you help me?

Sorry for my bad english.

I have the same problem on a samsung galaxy pro 12.2, but the issue it's present in chrome too but only sometime.

On a cheap asus tablet the games runs smoothly...I don't know why...

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