TUSB7340: The USB 2.0 and 3.0 downstream ports show inconsistent behavior when USB drives are physically connected or disconnected.

Part Number: TUSB7340

Tool/software:

I am using TUSB7340 usb3 hub in my design. When I connect any usb3 device on downstream port of this USB hub, the device works with USB2 and only sometimes it works as usb3 device. what could be the issue and how to debug