j5 heat problems

well my phone cpu is always around 40 - 50 at any clock ( 0.8 to 1.2 ) and this produces a heat around the screen ( the phone is blazing fast and smooth consumes a fair amount of battery ) i 've installed before many roms and this problems started when i first used root booster with 6.0.1 then it presisted with any rom i install even flashing official rom don't change the config
my questions is is those thermals normal ?
can somebody screeshot CPU covernor tunable from kernel auditor
and how can i reset my cpu original setting

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