Critical Bug: Missing Rock Models in Large Areas of White Cliffs

While my dinosaur was gaining growth progress, I travelled into the White Cliffs area. All rock models within this zone are completely missing visually.(X=-228613.402728,Y=-85784.23402,Z=2179.955066)
The rocks are invisible, which may lead to players falling through terrain or misjudging obstacles.

The rock meshes are missing entirely, and my dinosaur can walk straight through inside them due to missing collision hitboxes.

These rocks are supposed to be solid objects that cannot be walked through.
Besides, my in-game chat functions perfectly, there is no stuttering or lag, and my network latency is completely normal.