USB 3.0 no longer works after update to Mac OS 10.13.3 (High Sierra). It was working fine under a previous High Sierra version (not sure if I was at .1 or .2).
Everything was working fine on my MacBook Pro (15" 2017) and the UD-ULTCDL. I had a wired Apple extended keyboard and a couple iPhones plugged into the USB ports on the docking station.
I updated the macOS from an earlier version of High Sierra to 10.13.3 today. After the update, none of the USB ports in the docking station work. (I also have a little plugable brand hub and plugging them into that works fine).