GearVR wont initialize the scene (working fine in Editor)

I'm working on a prototype for a dynamically generated UI for Samsung GearVR; every UI object is generated when the aplication starts.

When playing the aplication in the editor everything works just fine:

(the items in front of the left camera are dynamically generated)

But when I test it on GearVR it looks like this: the dinamically generated items just won't appear.

There aren't any errors in the console, just some not-important warnings about "variable foo is never used".

Anyone can give me a hint about what may be the cause?

Thanks