Odd glitches in CAN rig

[hedgeberg]

Hello all
So my team decided to connect to our Jaguars using CAN this year for the first time. We got the Jaguars to connect to BDCCOMM, updated the firmware, bought a pre-made RS232/CAN cable, etc. Everything seems like it should work fine.
However, we recently noticed a really odd glitch where the first and third jaguars in a 4-jaguar chain, regardless of what their id is, are the only ones to work. regardless of how we order our jaguars or replace cables, we cannot get the second and fourth nodes to indicate that they have established a network connection.

Any ideas as to what the issue could be and how we could fix it?