Assets disappearing as I walk around the world

I recently uploaded a world and it’s a bit of a mess at the moment. my main issue is the assets disappearing randomly as I move around and I’m not sure how to fix it. I have a video posted below.

do the objects have lod groups?
you can check in the inspector
image
they make the objects disappear if the camera is too far away

occlusions are wrong

90% Occlusion Culling issue.
try adjusting these two depend on the world u do or untill u get the result u want.

  1. Smaller Occluders
  2. Smallest Hole