Happy to report my cheapo solution to the 7 Pin - auto disable backup issue.
I purchased a Electromagnet trailer brake magnet for a 7" hub
One wire to ground the other wire to pin 2 (Blue wire)
View attachment 35970
Works just like is should, plug in the 7 pin = no issues backing up with my rack installed.
Great work, per usual! Do you know if this options disables Cruise Control? When I was towing a camper a couple of months ago, it was disabled. While towing a camper, I'd probably not want to use Cruise Control but if I'm just hauling my bike around, I'd prefer to have it available as well as having the "backing up issues" resolved.