Mesh light doesn't cast shadows when invisible

[R_Cyph]

Hey,

we're using site geo with plate projections for some live action shots. When we turn the light mesh to invisible it also stops casting shadows, but still casts light. please help!

we're using maya 2014 with vray 2.45.01.24001

[svetlozar.draganov]

Would it be possible to send us a simplified version of that case ?
We've run a quick test here but we couldn't get this behavior.