I have just got the Dell D6000 universal dock; I have connected it to my laptop via USB-C.
But after a while my USB mouse stops working; the mouse is fine never a issue when plugged into the laptop directly.
Seems to happen when watching youtube; but not always; and not exclusively. It happened when typing into a VM instance also.
All returns to normal when I unplug and plug in the mouse. The keyboard seems unaffected.