Stuttering while playing

[𝕸𝖔𝖗𝖌𝖆𝖓]

From all the games I've played, this is the only game that causes stuttering. I've put up the task manager on my second monitor and noticed whenever those stutters happened, my CPU usage dropped to around 10 - 20%. Not sure if it's related, but seems important.

PC Specs
Nvidia GeForce RTX 4060
11th Gen Intel(R) Core(TM) i9-11900K @ 3.50GHz
16 GB of RAM
Windows 11

Any help appreciated.