On Cam move: mesh renderer object disapears on ios but not in editor

Hello and thanks for your time.

I have a scene with multiple mesh renderers stacked facing the camera. As I'm using orthographic cameras and I want strict draw layers I have multiple cameras as children of a main camera each with a culling mask assigned. This setup gives a nice parallax scroll when the camera(s) moves across the surface of the stack. Each is set to Depth Only, with appropriate culling masks, Projection, and clipping planes that are very generous. Each depth is set to the culling masks.

While playing on the Mac in the editor everything works fine, of course, but when played on ios an object assigned to a certain camera tends to pop in and out when the camera moves over it.

Any clues?