Why do I see screen tearing during high-speed combat in Naraka?

I was devastated when I noticed eerie jagged tearing on the edges of my screen during high-speed parries at 4K; it totally killed the immersion. I tried forcing 16x Anisotropic Filtering in the driver panel, but while textures looked sharper, the tearing persisted and left me confused. I finally used the GamePP DLSS/FSR Image Sampling Calibrator to raise sharpening from 40 to 65 and set the render scale to 98%. RTSS confirmed frame generation time converged to 7-11ms, with GPU-Z showing 2500-2750MHz and AIDA64 reporting a stable 60-65℃.