Mind sharing this workaround?
I'm not sure if it would work on the 2013 MacBook Air (I don't have one) but I had to plug in a monitor and keyboard, which worked fine, uninstall the BootCamp drivers for them, and then let Windows install the generic drivers. I think it was fixed with a BootCamp update, and I would suspect so would any issues on this one. But don't expect Apple to make it a priority.