Note 5 Heat problem

I am from Pakistan and a happy note 5(duos) user.I updated my phone to marshmallow yesterday when received ota update.Marshmallow is such a nice experience but a strange problem occurs.when i connect to wifi now then my battery temperature goes up and up till 34c or above and phone feels bit warmer on back. This problem was never happened to me on lollipop. Can anybody help me to resovle my issue??
i am completely stock no package disabler no root or no custom kernels

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