anormal objects positions in simulations using shapenet urdf and collision files

[yasmineYK]

Hello,

I have an issue with my objects' final position when I run a simulation.
Despite the random position and orientation I define for each scene, objects end up in strange as if it didn't "fall" at all, it stays standing on the floor in weird positions (standing generaly on the same very small surfaces).
My objects URDF files and collision files are generated with shapenet2kubric library using stages 0 to 4.

Could it be a bug in shapenet2kubric library or with the simulator?
I'd be really grateful if someone could help me.

Thank you all.