ADSP-21584 core hang

We run the program of SPI slave on adsp-21584 core1, and AM3359 as a SPI master communicates with ADSP-21584 every 1ms。An exception occurs after several days,In this case, after connecting with jtag, we found that core1 was hung, but core2 was normal。What are some possible reasons for this? 

ADSP-21584 silicone version:1.0

cces version:2.8.0