The LEDs on the sidecar are indeed brightly lit, and this problem persisted after we changed the sidecar, which is one of the reasons we're hesitant to accept it as a problem with the sidecar.
I thank you guys for your help--since we at least have a temporary fix, we haven't managed to find the time to search for something more permanent. I expect that we'll be able to spend more time on it today, as the electronics team hopefully (

) gets something of a pause in the action until our intake goes on the robot.