Why does FFVII Rebirth stutter in dense vegetation areas?

I was exploring the vast open world when I noticed that entering dense vegetation caused my frame rate to plummet from 144 to 70 FPS, totally breaking the immersion. I first tried disabling Core Parking in the BIOS, but that was a bust; it didn't stop the drops and actually spiked my idle power by 20W per HWMonitor. I then used the GamePP Resource Scheduler to set the game process priority to Realtime and locked tasks to the 3D V-Cache core cluster. RTSS monitoring showed frame times drop from 15-32ms to 6-9ms, while AIDA64 showed initial cluster temps at 62-68℃, eventually stabilizing at 74-78℃.