Hi,
please check the used bitrate settings. Instead of using the default SocketCAN definitions, please specify the bitrate exactly to the definitions of your CAN FD system (sample point etc.), to prevent any bus errors. Please also check the used CAN cables for 120 Ohms on both ends, and that the CAN nodes don't send the same CAN ID at the same time. This could also lead to arbitration crashes and bus off errors.
regards
Michael