Screen Flicker on Blade 15 Advanced (2020) RZ09-0330x

I'm experiencing screen flickering, but only when the charger is plugged in, and during certain games (Tested with Destiny 2, Elden Ring, SWTOR). Other games (Tested with Fallout: New Vegas, Terraria, Dark Souls Remastered) do not have this screen flicker, and there's no flickering at all when the charger isn't plugged in. It works fine on an external monitor as well. Any idea what's up? Do I just need to buy a new charger? Edit: I've already tried every software fix I can think of (Updating BIOS, drivers, etc) and none of it has worked.