Compiler/CC2640: Dual SPI transfer at the same time not working well

Part Number:CC2640

Tool/software: TI C/C++ Compiler

Hey,

I'm using 2 SPI's in cc2640 , each SPI transaction separately work's fine , when I'm trying to get both SPI work together one of them stop working .

First SPI defined as master and the seconds one defined  as slave ,SPI master continue to work , but the SPI slave after 10-20 transfers stop to react 

Should 2 SPI transfers work together ?

Thanks .