Why does Stellar Blade stutter during high-speed combat combos?

I felt totally robbed of immersion during high-speed combos in Stellar Blade; the screen would just jolt during special effects. I tried enabling Windows Game Mode, but it did nothing and actually caused some audio tearing, which was just confusing. I then used the GamePP Resource Scheduler to elevate the game process to Realtime priority and bound tasks to physical cores 2-6. RTSS monitoring showed frame times dropped from 12-35ms to a stable 8.2-11.5ms, while AIDA64 showed temps at 68-75℃.