Add on props stream in map

When I approached and when I changed the direction of the camera. It is intermittent.
It appears or disappears as the camera rotates but the collisions remain.

The object is placed in a folder within resources called “props” following the method:

And the map created with “Map editor” (although I have also tried with menyoo and follow the error).
Then I converted the map with “ME2YM”

When I use / spawnobject stable_prop, the building is correctly and does not disappear when I turn the camera