Hi. Today I bought new USB-C hub, TP-Link UH9120C, and I can't understand what's wrong with its USB-C port. It has one USB-C port for data transfer, but every time I connect a smartphone, tablet, action camera or even a smartwatch to it with USB-C to USB-C cable, that device isn't visible on PC. However what's strange, if I connect anything using USB-C to USB-A cable and then use adapter from USB-A to USB-C, then all of this devices suddenly work and are visible on PC. USB-C port on the hub must be working then, so where's the problem? I tried many USB-C USB-C cables, many devices, and the only thing that worked through hub's USB-C port without USB-A adapter was Calibrite device used for monitor color calibration. Also all of my devices work if connected with USB-C USB-C cable directly to PC's USB-C. So what's the purpose of USB-C port on the hub, if it's not working properly with USB-C - USB-C cables? Why using USB-A cable with USB-A - USB-C adapter fixes this strange issue?