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Smart RF Sniffer in Wi-SUN network, incorrect FCS in packet data

Other Parts Discussed in Thread: WI-SUN

I have three LP-CC1352-P7-1 boards, which I use to setup a Wi-SUN network.

One board is running ns_br_src  example, one board is running ns_coap_node_src example, and the last board is set up to be Smart RF Sniffer.

Otherwise everything seems to work OK, but Wireshark shows incorrect FCS for every data packet captured. The Wireshark screenshot is attached. 

Do I have something wrong in my setup, or what could be the reason for incorrect FCS?