This firmware has the capability to forward traffic between CAN0 and CAN1. This can be handy but unfortunately it is currently on as the default state. That's likely to cause all sorts of issues if you aren't expecting it. To stop this you can ground pins 11 and 12. But, this needs to be corrected so that forwarding is not the default. Forwarding should probably be an option within the serial menu and not tied to hardware pins (or maybe allow hardware pins but optionally).
This firmware has the capability to forward traffic between CAN0 and CAN1. This can be handy but unfortunately it is currently on as the default state. That's likely to cause all sorts of issues if you aren't expecting it. To stop this you can ground pins 11 and 12. But, this needs to be corrected so that forwarding is not the default. Forwarding should probably be an option within the serial menu and not tied to hardware pins (or maybe allow hardware pins but optionally).