AWR2944EVM: through SWsession transport pointCloud data

Hi expert,

     I use SWSession to capture point cloud data;and  user define the udp packet header;

but, the first udp packet no header data as figure 1. After ten packets, I fined the firest packet header,as figure2.why?

1.the software use out of box and self start,Evm as Function mode;

2.DCA1000 use Hwmode,through SW5 to start capture;