Totally reasonable assumption but let me add in another detail. The camper lights work fine all the way into the garage. They always work all the way to each destination. If it were camper movement, I would suspect the converter module output to blow in transit. When I disconnect the camper, the lights ARE working. It’s only when I go to hook up again that the lights are no longer working.
The Jeep is turned off while connections are made and broken.
Camper is disconnected from shore power while connecting to the Jeep.