After some research I have found a potential bug with the ASIAir Plus.
It seems that if I attempt to connect my Celestron Dew Controller from its USB3 B connector to the ASIAir USB3 A connector, no connection is established with the connected devices on the dew heater hub,
If you connect the dew heater hub to a USB2 A connector on the ASIAir all devices are recognized correctly.
I've attempted to swap multiple cables and nothing changes the result. This appears to be a bug, and I'd like to understand what is happening. If I'm only able to connect to the USB2 port on the Air, I'll be losing bandwidth for all the devices to communicate.
Jay