Originally Posted by luq529
On the google play there is an app called samsung dvfs disabler. You need to download it but additionally you need to install xposed framework to make it work and must have rooted phone
Disabling touchwiz dvfs should help with your problem.
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Haha,funny thing is,after weeks of searching,and the no-sleep last night,I finally found this thing,and here's your post.
Thanks for trying to help,though!
P.S Btw,still checking,as I haven't tested if it works still.
Update: Works! Happy than ever!
You could always press "Thanks" button,right?