Rigged assets visibility disappear depending on location/rotation of camera?

Hey team,
I’m having an issue where the 3D assets disappear randomly depending on the camera movement and location, I can’t find any consistency to determine what might be causing it.

The original file is a mocap sequence at 60fps from Blender, it works well in it.
Once exported to V3D, the characters visitbility goes on and off depending on the camera position and movement, and can’t figure out why.
Any clues?
There’s not puzzle, just an environment and two rigged characters.

I’m attaching a video to describe the issue.

Any ideas?
Thanks.