Do you mean that CYUSB3304 is showing "Unkown USB device" in device manager?
Can you make a screenshot?
Meanwhil, try to download USB tree view at the link below to check the device informaiton.
Do you know what else I should try?
From the screenshot, the HUB enumerates well which shows no hardware defect on upstream path.
You could try to connect other USB devices to HUB(same port on HUB), Flash disk, mouse for example, to check if they all fails to enumerate.
If so, we could presume that hardware defect may exist on downstream path. If anything else could enumerate on this port of HUB, it shows something wrong with your USB device.