Why does my Nitro V15-41 shuts down randomly while Gaming ?

I bought a Acer Nitro V15 - 41 with ryzen 7000 series processor with rtx 4050.
I faced with problem right after I bought the laptop and played the game for the first time 2 months back, what happens is While playing games especially some high end or online games the Laptop suddenly shutsdown that too randomly without blue/black screen or Shutting down screen its link pulling the plug. sometimes it shutsdown just after 15 min into the game or sometimes 2 hours into the game.

What I observed is when the laptop shuts down for the first time while playing and when I turn it back on again and start the game it wont shutdown suddenly I can play for 1.5 to 2 hours straight while it only lasted 15 mins in the first session.

I consulted my service center they did a Windows Reinstallation and It worked for a month.
I could play all the high end games like Cyberpunk and RDR2 in high settings without the turning off issue. But It started again when I tried to play CS2 which was online, But this time the shut downs weren't immediate Games usually lasted for 3 to 4 hours before the laptop shutsdown, This time period has started to shrink since then, now its back to the beginning The laptop shutsdown within 20 min during first session and after restart it can last for 2 hours max before shutting down.

What I believe is there is some settings problem in my laptop than an hardware issue, as The shutdown issue was fixed when the windows got reinstalled.

So please help me with this