FPS Slowly Drops and Consumes a lot of Power

Greetings I am playing via my laptop here and before I continue my topic let me post my computers system and the platform i used to play/game version etc.

Processor: Intel® Core™ i7-7500U CPU @ 2.70GHz (4 CPUs), ~2.9GHz
Memory: 12288MB RAM
Current Mode: 1920 x 1080 (32 bit) (60Hz)
Card name: Intel® HD Graphics 620
Card name: NVIDIA GeForce 940MX

I am using Windows 10 and my game version is 1.3.5

Game is always at 60 fps and works fine most of the time. My problem is when I view/unequip artifact button, Fps slowly drops to 9-10 and consumes a lot of power. However It never happened before in any game or any section of this game. It happens only if i wait at view/unequip artifact button. Does it normal? Does it uses a different telemety or something? Please help. Thank you.