Bug is that in Control Panel under Devices and Printers, Windows 10 shows devices as connected even after they have been disconnected and removed from the powered usb 3 hub. Seems like windows only marks the device disconnected only is the usb cable is removed physically from the port. So in case of a powered USB hub, where we don't remove the cable, it shows as device is connected but with an exclamation mark. It just says device has been marked for safe removal but has not been removed from the computer.
See images below:
See images below: