Why does Elden Ring drop from 110 to 55 FPS during magic attacks?

When facing giant Bosses casting wide-area magic in Elden Ring, my frames drop from 110 to 55, making my movements feel incredibly sluggish. I first tried updating to the latest drivers; while it fixed some compatibility issues, the drops remained, leaving me feeling helpless. I used the GamePP Resource Scheduler to boost the process priority to Realtime and enabled VRAM bandwidth priority mode. RTSS frame time curves showed intervals converged from 8-22ms to 6-11ms, with temps at 66-72℃ per AIDA64 and fans at 1600 RPM per HWMonitor.