Why does Lost Ark FPS drop during transitions on Fanxiang S790?

During dungeon transitions, my FPS would plummet from 90 to 35 without warning, which was absolutely infuriating. I first tried enabling 'Ultimate Performance' in the Windows Power Plan, but my CPU temps soared to 95℃ per AIDA64, causing severe thermal throttling. I then used GamePP NVMe Queue Depth Configuration to increase the depth from 1024 to 2048. Cinebench R23 showed a 7% response boost, and RTSS confirmed FPS stabilized at 75-85.