Spawn actors on mobile doesnt works

Hi,

i’m working on a VR project for mobile (GearVR),
I setuped a BP system for randomize spawns at beginplay, everythings works fine on PC, but it dosent works on mobile (nothings spawn)

Any help ? i read a lot of things but i can’t get rid of this issue

this is how my BP is done :

its like some coins to capture, how can i spawn instances instead ?

Thanks

Faced same issue at 4.22.3