My Fanxiang S790 4TB keeps dropping the link and freezing the game when loading maps, why now?

Every time I stepped into a high-difficulty dungeon, the game would just hard-lock on the loading screen. The randomness of these crashes was honestly stressing me out. The Fanxiang S790 is a beast for capacity, but in PCIe 4.0 mode, motherboard signal interference was forcing the link to flip-flop between Gen4 and Gen3, causing I/O hangs between 200ms - 500ms. I wasted a good hour swapping M.2 slots, but the freezes kept happening every ten minutes. The real fix was going into the BIOS and forcing the PCIe slot protocol to Gen4 instead of 'Auto', and disabling Link State Power Management in Windows. CrystalDiskMark now shows a rock-solid 7000MB/s without those sudden dips. I did have a couple of cold-boot recognition issues after locking Gen4, but a motherboard BIOS update killed that problem. Drive temps are sitting around 48℃ - 55℃. After five consecutive dungeon loads with zero crashes, the input response finally feels tight and responsive.