Why does my loading bar freeze at 80% when switching map scenes?

In fast-paced dungeon fights, every time I switched scenes, the loading bar would hang at 80% for seconds, which was absolutely maddening. I first tried disabling all unnecessary background updates in Windows, but the improvement was nearly zero, which felt quite ironic. I used the GamePP NVMe Queue Depth Configuration to increase the depth from 1024 to 2048 and optimized I/O priority. CrystalDiskMark showed 4K read speeds rose to 68-75MB/s, and HWInfo64 confirmed motherboard temps at 45-52℃.