One issue with the 3rd-gen Fire TV Cube that was causing a bit of headache among enthusiasts was Amazon’s decision to cut power to the device’s USB port when the Cube went to sleep. Among other issues, this prevented the use of faster external Ethernet adapters to remain functional while the Fire TV Cube was not being used. Amazon has now informed me that this issue has been corrected through a recent software update. I tested it and, sure enough, the USB port on the Fire TV Cube 3 now remains powered while the device is asleep.
Does it support disable the USB power when Cube went to sleep ?