Why does Minecraft RTX freeze during fast chunk exploration?

While exploring deep sea caves with Ray Tracing, the screen suddenly froze for 0.4 seconds, which made me incredibly anxious. I tried reducing the render distance to 8 chunks; while FPS improved, the I/O bottleneck remained and stutters persisted. I then used GamePP NVMe Queue Depth Configuration to increase the queue depth from 32 to 256. The results were night and day: AIDA64 recorded random read performance increasing to 72-80MB/s, with latency dropping from 65-88ms, and drive temperature steady at 42-48℃ per HWMonitor.