Lumia 950 XL screen issues

Phone Works Fine, Screen doesn't have any damaged, touchscreen works fine.

But I have an issue with my phone, my phone screen blinking to the blank every couple seconds.

When I don't use my phone and it goes to standby mode, the screen goes to the green color, but when I wake up phone screen come backs to normal colors, but screen still blinking every 2 seconds to blank.

But when I do updates or restoring the phone,due that process screen work fine, screen doesnt blink at all and all colors looks fine.Blinking just happens when I use phone.

I tried connect my phone to tv, everything works fine.

So I guess is not hardware issue, but also I dont think it is software issue also, because I tried install different versions of software and it doesnt fixed my issue.

Anybody have an idea what could make this issue?

Any suggestions How can I fix it?