There are only two nodes on the CAN bus. The termination resistance on both ends of the CAN bus is 120Ω. One node on the CAN bus is the  board and the other node is the  board. Baud rate 500K. The CAN circuit is as follows:
The following waveform is the waveform between the CANH and CANL of the  board.
CAN bus length 35 meters,
CAN bus length 8 meters
The problem cannot be solved by shorting L9, L10.
The waveform between the CANH and CANL of the board is very good and has no problem.