Freeze

I bought my Triton 500 in december 2019 Updated BIOS TRITON 500 2019 I5 9300H rtx2060 16GB 2666mHz 256 Gb SSD
I never had issues
Bit since 1 week everytime i unplug , the laptop freeze without BSOD and i see everything on the screen , i need to force the shutdown manually
Firstly i think it can be due to my undervolt , because the tension is lower when unpluged
i always had -0,165 undervolt (the undervolt go to -0,200 but instable so i choose stability)
But as i said i always undervolted since day 1
No bsod only full freeze , today i tried to replug to see what happens , nothing the freeze still continue
I wish i can get help
I always use my laptop still if it's 100% for performance (i emulate android + csgo)
sometimes i unplug to only use in normal ways and freeze occurs
And secondly is average of 60-75C° idle cpu temp normal ?
When emulating android + idling Youtube
Thank you for the help